mbusgateway3variant/cube/User/Src/mbusComm.c

#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <math.h>

#include <main.h>
#include <usart.h>
#include <PontCoopScheduler.h>
#include <mbusComm.h>
#include <loopCtrl.h>
#include <show.h>
#include <logger.h>
#include <frontend.h>
#include <wizHelper.h>
#include <mbusParserExt.h>
#include <mqttComm.h>
#include <oled.h>

#include <mbus/mbus-protocol.h>

static const char MBUS_TOPIC[] = "IoT/MBGW3/Measurement";

static const uint8_t MBUS_QUERY_CMD = 0x5b;

typedef enum {
    MBCR_SUCCESS = 0,
    MBCR_ERROR_TIMEOUT,
    MBCR_ERROR_LOOP_FAILURE,
    MBCR_ERROR_TX_REG_UNACCESSIBLE,
    MBCR_ERROR_OUT_OF_MEMORY__FRAME,
    MBCR_ERROR_OUT_OF_MEMORY__USERDATA,
    MBCR_ERROR_STATE_ENGINE__START1,
    MBCR_ERROR_STATE_ENGINE__LENGTH1,
    MBCR_ERROR_STATE_ENGINE__LENGTH2,
    MBCR_ERROR_STATE_ENGINE__START2,
    MBCR_ERROR_STATE_ENGINE__INVALID_CHKSUM,
    MBCR_ERROR_STATE_ENGINE__STOP,
    MBCR_ERROR_STATE_ENGINE__ILLEGAL_STATE,
    MBCR_ERROR_STATE_ENGINE__UNKNOWN
} e_mbusCommResult;

typedef enum {
    MBCS_IDLE,
    MBCS_SEND,
    MBCS_SEND_CONTINUED,
    MBCS_SENDING_DONE,
    MBCS_ENABLE_FRONTEND,
    MBCS_START1,
    MBCS_LENGTH1,
    MBCS_LENGTH2,
    MBCS_START2,
    MBCS_C_FIELD,
    MBCS_A_FIELD,
    MBCS_CI_FIELD,
    MBCS_USERDATA,
    MBCS_CHKSUM,
    MBCS_STOP,
    MBCS_DONE,
    MBCS_TIMEOUT,
    MBCS_DISABLE_FRONTEND,
    MBCS_ERROR,
    MBCS_ERROR_CONTINUED
} e_mbusCommState;

typedef struct {
  uint8_t start1;
  uint8_t length1;
  uint8_t length2;
  uint8_t start2;
  uint8_t l;
  uint8_t c;
  uint8_t a;
  uint8_t ci;
  uint8_t *userdata;
  uint8_t chksum;
  uint8_t stop;
} t_longframe;

typedef struct {
    uint32_t requestId;
    e_mbusCommState state;
    uint8_t retryCnt;
    uint8_t cmd;
    uint8_t addr;
    uint8_t sendBuf[5];
    uint8_t receiveCnt;
    uint8_t receivedOctet;
    bool receiving;
    e_mbusCommResult result;
    t_longframe frame;
    t_mbusDevice *device;
} t_mbusCommHandle;


static t_mbusCommHandle mbusCommHandle = { .requestId = 0, .state = MBCS_IDLE, .retryCnt = 0, .cmd = 0, .addr = 0, .receiveCnt = 0, .receivedOctet = 0, .receiving = false };

static t_mbusCommStats mbusCommStats = { .requestCnt = 0, .errorCnt = 0, .overrunCnt = 0 };

static bool mbusCommEnabled = true;

void mbusCommSetStats(t_mbusCommStats stats) {
    mbusCommStats = stats;
}

t_mbusCommStats *mbusCommGetStats() {
    return &mbusCommStats;
}


static void printError(t_mbusCommHandle *localMbusCommHandle) {
    float errorRatio = ((float) localMbusCommHandle->device->failures) / ((float) localMbusCommHandle->device->requests);
    coloredMsg(LOG_YELLOW, true, "mbc pe [%d] Error ratio is %.2f", 
               localMbusCommHandle->requestId,
               errorRatio);
    mqttPublishf(MBUS_TOPIC, "{\"Status\":\"Error\", \"RequestId\":\"%d\", \"Device\":\"%s\", \"Errors\":\"%d\", \"Requests\":\"%d\", \"ErrorRatio\":\"%.2f\"}", 
                 localMbusCommHandle->requestId, localMbusCommHandle->device->deviceName,
                 localMbusCommHandle->device->failures, localMbusCommHandle->device->requests, errorRatio);
    oledPrintf(OLED_SCREEN0, "Err:%d/%d %.2f", localMbusCommHandle->device->failures, localMbusCommHandle->device->requests, errorRatio);
}



static void parseAndPrintFrame(t_mbusCommHandle *localMbusCommHandle) {
    t_longframe *frame = &(localMbusCommHandle->frame);

    mbus_frame reply;
    memset(&reply, 0, sizeof(reply));

    //mbus_parse(&reply, buf, len);
    reply.start1 = frame->start1;
    reply.length1 = frame->length1;
    reply.length2 = frame->length2;
    reply.start2 = frame->start2;
    reply.control = frame->c;
    reply.address = frame->a;
    reply.control_information = frame->ci;
    memcpy(reply.data, frame->userdata, frame->length1 - 3);
    reply.checksum = frame->chksum;
    reply.stop = frame->stop;
    reply.type = MBUS_FRAME_TYPE_LONG;
    reply.data_size = frame->length1 - 3;

    mbus_frame_data frame_data;
    memset(&frame_data, 0, sizeof(frame_data));

    int r = mbus_frame_data_parse(&reply, &frame_data);
    if (r == 0) {
        mbus_data_variable *data_var = &(frame_data.data_var);
        coloredMsg(LOG_YELLOW, false, "mbc papf [%d] sts: %02x", localMbusCommHandle->requestId, data_var->header.status);
        if ((data_var->header.status & 0x01)) {
            coloredMsg(LOG_RED, true, "mbc papf [%d] sts: Application Busy", localMbusCommHandle->requestId);
        }
        if ((data_var->header.status & 0x02)) {
            coloredMsg(LOG_RED, true, "mbc papf [%d] sts: Any Application Error", localMbusCommHandle->requestId);
        }
        if ((data_var->header.status & 0x04)) {
            coloredMsg(LOG_RED, true, "mbc papf [%d] sts: Power Low", localMbusCommHandle->requestId);
        }
        if ((data_var->header.status & 0x08)) {
            coloredMsg(LOG_RED, true, "mbc papf [%d] sts: Permanent Error", localMbusCommHandle->requestId);
        }
        if ((data_var->header.status & 0x10)) {
            coloredMsg(LOG_RED, true, "mbc papf [%d] sts: Temporary Error", localMbusCommHandle->requestId);
        }
        if ((data_var->header.status & 0x20)) {
            coloredMsg(LOG_RED, true, "mbc papf [%d] sts: Specific to manufacturer Error 1", localMbusCommHandle->requestId);
        }
        if ((data_var->header.status & 0x40)) {
            coloredMsg(LOG_RED, true, "mbc papf [%d] sts: Specific to manufacturer Error 2", localMbusCommHandle->requestId);
        }
        if ((data_var->header.status & 0x80)) {
            coloredMsg(LOG_RED, true, "mbc papf [%d] sts: Specific to manufacturer Error 3", localMbusCommHandle->requestId);
        }
        mbus_data_record *record;
        int i;
        const char *keys[MBUSDEVICE_NUM_OF_CONSIDEREDFIELDS];
        float values[MBUSDEVICE_NUM_OF_CONSIDEREDFIELDS];
        uint8_t numOfConsideredFields = 0;
        for (record = data_var->record, i = 0;
             record;
             record = record->next, i++) {
            for (uint8_t j = 0; j < MBUSDEVICE_NUM_OF_CONSIDEREDFIELDS; j++) {
                if (localMbusCommHandle->device->consideredField[j] == i) {
                    parsedVIB_t parsedVIB = parseVIB(record->drh.vib);
                    coloredMsg(LOG_YELLOW, false, "mbc papf [%d] parsed VIB N: %s, U: %s, E: %d",
                               localMbusCommHandle->requestId,
                               parsedVIB.name, parsedVIB.unit, parsedVIB.exponent);
                    if (parsedVIB.found) {
                        uint32_t value = strtol(mbus_data_record_value(record), NULL, 10);
                        float weightedValue = ((float) value) * powf(10.0, ((float) parsedVIB.exponent));
                        coloredMsg(LOG_YELLOW, true, "mbc papf [%d] %s is %.1f %s (%d * 10^%d)",
                                   localMbusCommHandle->requestId, parsedVIB.name, weightedValue, parsedVIB.unit,
                                   value, parsedVIB.exponent);
                        keys[numOfConsideredFields] = parsedVIB.name;
                        values[numOfConsideredFields] = weightedValue;
                        numOfConsideredFields++;
                    } else {
                        coloredMsg(LOG_YELLOW, true, "mbc papf [%d] L:%d, VIF: 0x%02x U:%s V:%s", 
                                   localMbusCommHandle->requestId,
                                   localMbusCommHandle->device->consideredField[j],
                                   record->drh.vib.vif,
                                   mbus_data_record_unit(record),
                                   mbus_data_record_value(record));
                    }
                    
                }
            }
        }
        float errorRatio = ((float) localMbusCommHandle->device->failures) / ((float) localMbusCommHandle->device->requests);
        coloredMsg(LOG_YELLOW, true, "mbc papf [%d] Error ratio is %.2f", 
                                   localMbusCommHandle->requestId,
                                   errorRatio);
        if (numOfConsideredFields == 1) {
            mqttPublishf(MBUS_TOPIC, "{\"Status\":\"Ok\", \"RequestId\":\"%d\", \"Device\":\"%s\", \"Errors\":\"%d\", \"Requests\":\"%d\", \"ErrorRatio\":\"%.2f\", " \
                                     "\"Values\":{\"%s\":\"%.1f\"}}", 
                         localMbusCommHandle->requestId, localMbusCommHandle->device->deviceName,
                         localMbusCommHandle->device->failures, localMbusCommHandle->device->requests, errorRatio,
                         keys[0], values[0]);
        } else if (numOfConsideredFields == 2) {
            mqttPublishf(MBUS_TOPIC, "{\"Status\":\"Ok\", \"RequestId\":\"%d\", \"Device\":\"%s\", \"Errors\":\"%d\", \"Requests\":\"%d\", \"ErrorRatio\":\"%.2f\", " \
                                     "\"Values\":{\"%s\":\"%.1f\", \"%s\":\"%.1f\"}}", 
                         localMbusCommHandle->requestId, localMbusCommHandle->device->deviceName,
                         localMbusCommHandle->device->failures, localMbusCommHandle->device->requests, errorRatio,
                         keys[0], values[0], keys[1], values[1]);
        } else if (numOfConsideredFields == 3) {
            mqttPublishf(MBUS_TOPIC, "{\"Status\":\"Ok\", \"RequestId\":\"%d\", \"Device\":\"%s\", \"Errors\":\"%d\", \"Requests\":\"%d\", \"ErrorRatio\":\"%.2f\", " \
                                     "\"Values\":{\"%s\":\"%.1f\", \"%s\":\"%.1f\", \"%s\":\"%.1f\"}}", 
                         localMbusCommHandle->requestId, localMbusCommHandle->device->deviceName,
                         localMbusCommHandle->device->failures, localMbusCommHandle->device->requests, errorRatio,
                         keys[0], values[0], keys[1], values[1], keys[2], values[2]);
        } else if (numOfConsideredFields == 4) {
            mqttPublishf(MBUS_TOPIC, "{\"Status\":\"Ok\", \"RequestId\":\"%d\", \"Device\":\"%s\", \"Errors\":\"%d\", \"Requests\":\"%d\", \"ErrorRatio\":\"%.2f\", " \
                                     "\"Values\":{\"%s\":\"%.1f\", \"%s\":\"%.1f\", \"%s\":\"%.1f\", \"%s\":\"%.1f\"}}", 
                         localMbusCommHandle->requestId, localMbusCommHandle->device->deviceName,
                         localMbusCommHandle->device->failures, localMbusCommHandle->device->requests, errorRatio,
                         keys[0], values[0], keys[1], values[1], keys[2], values[2], keys[3], values[3]);
        }
        oledPrintf(OLED_SCREEN0, "Ok:%d/%d %.2f", localMbusCommHandle->device->failures, localMbusCommHandle->device->requests, errorRatio);
        mbus_data_record_free(data_var->record);
    } else {
        coloredMsg(LOG_RED, true, "mbc papf [%d] err: unable to parse frame", localMbusCommHandle->requestId);
    }
}


static void handleRequestEngine(void *handle);
static void timeoutHandler(void *handle) {
    t_mbusCommHandle *localMbusCommHandle = (t_mbusCommHandle*) handle;
    // coloredMsg(LOG_RED, true, "mbc th [%d] timeout", localMbusCommHandle->requestId);
    localMbusCommHandle->state = MBCS_TIMEOUT;
    localMbusCommHandle->receiving = false;
    handleRequestEngine(handle);
}

static void receiveNext(t_mbusCommHandle *localMbusCommHandle) {
    localMbusCommHandle->receiving = true;
    // coloredMsg(LOG_RED, false, "RN1: %d", localMbusCommHandle->state);
    __attribute__((unused)) HAL_StatusTypeDef res = HAL_UART_Receive_IT(&mbusUart, &(localMbusCommHandle->receivedOctet), 1);
    // coloredMsg(LOG_RED, false, "RN2: 0x%02x", res);
}

void mbusCommRxCpltCallback(UART_HandleTypeDef *huart) {
    if (mbusCommHandle.receiving) {
        // coloredMsg(LOG_RED, false, "RO: 0x%02x", mbusCommHandle.receivedOctet);
        schAdd(handleRequestEngine, (void*) &mbusCommHandle, 0, 0);
        mbusCommHandle.receiving = false;
    }
}

void mbusCommErrorCallback(UART_HandleTypeDef *huart) {
    coloredMsg(LOG_RED, false, "mbc errcb 0x%02x", huart->ErrorCode);
    if (huart->ErrorCode == HAL_UART_ERROR_ORE) {
        coloredMsg(LOG_RED, false, "mbc errcb overrun error, restart receiving");
        mbusCommStats.overrunCnt += 1;
        HAL_StatusTypeDef res = HAL_UART_Receive_IT(&mbusUart, &(mbusCommHandle.receivedOctet), 1);
        coloredMsg(LOG_RED, false, "mbc errcb, recv: 0x%02x", res);
    }
}

static void handleRequestEngine(void *handle) {
    t_mbusCommHandle *localMbusCommHandle = (t_mbusCommHandle*) handle;

    static uint8_t userdataIdx = 0;
    static uint8_t calculatedChksum = 0;

    switch (localMbusCommHandle->state) {
        case MBCS_IDLE:
        coloredMsg(LOG_YELLOW, false, "mbc hre [%d] state IDLE", localMbusCommHandle->requestId);
        break;

        case MBCS_SEND:
        // coloredMsg(LOG_YELLOW, false, "mbc hre [%d] state SEND", localMbusCommHandle->requestId);
        localMbusCommHandle->sendBuf[0] = 0x10;
        localMbusCommHandle->sendBuf[1] = localMbusCommHandle->cmd;
        localMbusCommHandle->sendBuf[2] = localMbusCommHandle->addr;
        localMbusCommHandle->sendBuf[3] = localMbusCommHandle->cmd + localMbusCommHandle->addr; // checksum
        localMbusCommHandle->sendBuf[4] = 0x16;
        localMbusCommHandle->state = MBCS_SEND_CONTINUED;
        // no break !!

        case MBCS_SEND_CONTINUED:
        // coloredMsg(LOG_YELLOW, false, "mbc hre [%d] state SEND_CONTINUED", localMbusCommHandle->requestId);
        show(LED_RED, OFF);
        if (! loopActive) {
            coloredMsg(LOG_YELLOW, true, "mbc hre [%d] enabling loop, try %d", localMbusCommHandle->requestId, localMbusCommHandle->retryCnt);
            localMbusCommHandle->retryCnt++;
            loopEnable();
            schAdd(handleRequestEngine, handle, 100, 0); // give 100ms to settled the loop
        } else {
            localMbusCommHandle->retryCnt = 0;
            HAL_UART_Transmit_IT(&mbusUart, localMbusCommHandle->sendBuf, 5);
            // transition from here to SENDING_DONE is initiate by mbusCommTxCpltCallback
            // interrupt callback
            localMbusCommHandle->state = MBCS_SENDING_DONE;
        }
        break;

        case MBCS_SENDING_DONE:
        // coloredMsg(LOG_YELLOW, false, "mbc hre [%d] state SENDING_DONE", localMbusCommHandle->requestId);
        localMbusCommHandle->state = MBCS_ENABLE_FRONTEND;
        schAdd(handleRequestEngine, handle, 3, 0);
        break;

        case MBCS_ENABLE_FRONTEND:
        // coloredMsg(LOG_YELLOW, false, "mbc hre [%d] state ENABLE_FRONTEND", localMbusCommHandle->requestId);
        frontendEnable();
        schAdd(timeoutHandler, handle, 2500, 0);
        calculatedChksum = 0;
        userdataIdx = 0;
        localMbusCommHandle->state = MBCS_START1;
        receiveNext(localMbusCommHandle);
        break;

        case MBCS_START1:
        if (localMbusCommHandle->receivedOctet == 0x68) {
            localMbusCommHandle->frame.start1 = localMbusCommHandle->receivedOctet;
            localMbusCommHandle->state = MBCS_LENGTH1;
            receiveNext(localMbusCommHandle);
        } else {
            coloredMsg(LOG_RED, true, "mbc hre [%d] err: invalid start1 symbol %02x", localMbusCommHandle->requestId, localMbusCommHandle->receivedOctet);
            localMbusCommHandle->result = MBCR_ERROR_STATE_ENGINE__START1;
            localMbusCommHandle->state = MBCS_ERROR;
            schAdd(handleRequestEngine, handle, 0, 0);
        }
        break;

        case MBCS_LENGTH1:
        if (localMbusCommHandle->receivedOctet <= 3) {
            coloredMsg(LOG_RED, true, "mbc hre [%d] err: length to small %02x", localMbusCommHandle->requestId, localMbusCommHandle->receivedOctet);
            localMbusCommHandle->result = MBCR_ERROR_STATE_ENGINE__LENGTH1;
            localMbusCommHandle->state = MBCS_ERROR;
            schAdd(handleRequestEngine, handle, 0, 0);
        } else {
            localMbusCommHandle->frame.length1 = localMbusCommHandle->receivedOctet;
            localMbusCommHandle->frame.userdata = (uint8_t*) malloc(localMbusCommHandle->frame.length1 - 3);
            if (! localMbusCommHandle->frame.userdata) {
                coloredMsg(LOG_RED, true, "mbc hre [%d] err: unable to allocate memory for userdata", localMbusCommHandle->requestId);
                localMbusCommHandle->result = MBCR_ERROR_OUT_OF_MEMORY__USERDATA;
                localMbusCommHandle->state = MBCS_ERROR;
                schAdd(handleRequestEngine, handle, 0, 0);
            } else {
                localMbusCommHandle->state = MBCS_LENGTH2;
                receiveNext(localMbusCommHandle);
            }
        }
        break;

        case MBCS_LENGTH2:
        if (localMbusCommHandle->frame.length1 != localMbusCommHandle->receivedOctet) {
            coloredMsg(LOG_RED, true, "mbc hre [%d] err: invalid length2 %02x vs. %02x", 
                       localMbusCommHandle->requestId, localMbusCommHandle->frame.length1, localMbusCommHandle->receivedOctet);
            localMbusCommHandle->result = MBCR_ERROR_STATE_ENGINE__LENGTH2;
            localMbusCommHandle->state = MBCS_ERROR;
            schAdd(handleRequestEngine, handle, 0, 0);
        } else {
            localMbusCommHandle->frame.length2 = localMbusCommHandle->receivedOctet;
            localMbusCommHandle->state = MBCS_START2;
            receiveNext(localMbusCommHandle);
        }
        break;

        case MBCS_START2:
        if (localMbusCommHandle->receivedOctet == 0x68) {
            localMbusCommHandle->frame.start2 = localMbusCommHandle->receivedOctet;
            localMbusCommHandle->state = MBCS_C_FIELD;
            receiveNext(localMbusCommHandle);
        } else {
            coloredMsg(LOG_RED, true, "mbc hre [%d] err: invalid start2 symbol %02x", 
                       localMbusCommHandle->requestId, localMbusCommHandle->receivedOctet);
            localMbusCommHandle->result = MBCR_ERROR_STATE_ENGINE__START2;
            localMbusCommHandle->state = MBCS_ERROR;
            schAdd(handleRequestEngine, handle, 0, 0);
        }
        break;

        case MBCS_C_FIELD:
        localMbusCommHandle->frame.c = localMbusCommHandle->receivedOctet;
        calculatedChksum += localMbusCommHandle->receivedOctet;
        localMbusCommHandle->state = MBCS_A_FIELD;
        receiveNext(localMbusCommHandle);
        break;

        case MBCS_A_FIELD:
        localMbusCommHandle->frame.a = localMbusCommHandle->receivedOctet;
        calculatedChksum += localMbusCommHandle->receivedOctet;
        localMbusCommHandle->state = MBCS_CI_FIELD;
        receiveNext(localMbusCommHandle);
        break;

        case MBCS_CI_FIELD:
        localMbusCommHandle->frame.ci = localMbusCommHandle->receivedOctet;
        calculatedChksum += localMbusCommHandle->receivedOctet;
        localMbusCommHandle->state = MBCS_USERDATA;
        receiveNext(localMbusCommHandle);
        break;

        case MBCS_USERDATA:
        localMbusCommHandle->frame.userdata[userdataIdx] = localMbusCommHandle->receivedOctet;
        calculatedChksum += localMbusCommHandle->receivedOctet;
        userdataIdx++;
        if (userdataIdx == (localMbusCommHandle->frame.length1 - 3)) {
            localMbusCommHandle->state = MBCS_CHKSUM;
        }
        receiveNext(localMbusCommHandle);
        break;

        case MBCS_CHKSUM:
        if (localMbusCommHandle->receivedOctet != calculatedChksum) {
            coloredMsg(LOG_RED, true, "mbc hre [%d] err: invalid checksum %02x vs %02x", 
                       localMbusCommHandle->requestId, calculatedChksum, localMbusCommHandle->receivedOctet);
            localMbusCommHandle->result = MBCR_ERROR_STATE_ENGINE__INVALID_CHKSUM;
            localMbusCommHandle->state = MBCS_ERROR;
            schAdd(handleRequestEngine, handle, 0, 0);
        } else {
            localMbusCommHandle->frame.chksum = localMbusCommHandle->receivedOctet;
            localMbusCommHandle->state = MBCS_STOP;
            receiveNext(localMbusCommHandle);
        }
        break;

        case MBCS_STOP:
        if (localMbusCommHandle->receivedOctet == 0x16) {
            localMbusCommHandle->frame.stop = localMbusCommHandle->receivedOctet;
            localMbusCommHandle->state = MBCS_DONE;
            schAdd(handleRequestEngine, handle, 0, 0);
        } else {
            coloredMsg(LOG_RED, true, "mbc hre [%d] err: invalid stop symbol %02x", 
                       localMbusCommHandle->requestId, localMbusCommHandle->receivedOctet);
            localMbusCommHandle->result = MBCR_ERROR_STATE_ENGINE__STOP;
            localMbusCommHandle->state = MBCS_ERROR;
            schAdd(handleRequestEngine, handle, 0, 0);
        }
        break;

        case MBCS_DONE:
        // coloredMsg(LOG_YELLOW, false, "mbc hre [%d] state DONE", localMbusCommHandle->requestId);
        parseAndPrintFrame(localMbusCommHandle);
        if (localMbusCommHandle->frame.userdata != NULL) {
            free(localMbusCommHandle->frame.userdata);
            localMbusCommHandle->frame.userdata = NULL;
        }
        localMbusCommHandle->result = MBCR_SUCCESS;
        localMbusCommHandle->state = MBCS_DISABLE_FRONTEND;
        schDel(timeoutHandler, handle);
        schAdd(handleRequestEngine, handle, 0, 0);
        break;

        case MBCS_ERROR:
        coloredMsg(LOG_RED, false, "mbc hre [%d] state ERROR", localMbusCommHandle->requestId);
        show(LED_RED, ON);
        localMbusCommHandle->state = MBCS_ERROR_CONTINUED;
        // no break

        case MBCS_ERROR_CONTINUED:
        receiveNext(localMbusCommHandle);
        break;

        case MBCS_TIMEOUT:
        coloredMsg(LOG_RED, false, "mbc hre [%d] state TIMEOUT", localMbusCommHandle->requestId);
        mbusCommStats.errorCnt += 1;
        localMbusCommHandle->device->failures += 1;
        printError(localMbusCommHandle);
        localMbusCommHandle->receiving = false;        
        if (localMbusCommHandle->frame.userdata != NULL) {
            free(localMbusCommHandle->frame.userdata);
            localMbusCommHandle->frame.userdata = NULL;
        }
        HAL_UART_AbortReceive(&mbusUart);
        uint8_t kitchenSink[16];
        memset(kitchenSink, 0, 16);
        HAL_StatusTypeDef r = HAL_UART_Receive(&mbusUart, kitchenSink, 16, 100);
        coloredMsg(LOG_RED, false, "mbc hre [%d] abort, last receive result: %02x", localMbusCommHandle->requestId, r);
        // no break

        case MBCS_DISABLE_FRONTEND:
        // coloredMsg(LOG_YELLOW, false, "mbc hre [%d] state DISABLE_FRONTEND", localMbusCommHandle->requestId);
        frontendDisable();
        localMbusCommHandle->state = MBCS_IDLE;
        break;
        

        default:
        localMbusCommHandle->state = MBCS_IDLE;
        break;
    }
}

void mbusCommTxCpltCallback(UART_HandleTypeDef *huart) {
    schAdd(handleRequestEngine, (void*) &mbusCommHandle, 0, 0);
}


void mbusCommEnable(bool enable) {
    mbusCommEnabled = enable;
}

static e_mbusCommRequestResult mbusCommRequest(t_mbusDevice *mbusDevice) {
    e_mbusCommRequestResult res = MBCRR_BUSY;

    if (mbusCommEnabled) {
        if (mbusCommHandle.state == MBCS_IDLE) {
            mbusCommHandle.requestId += 1;
            mbusCommHandle.state = MBCS_SEND;
            mbusCommHandle.retryCnt = 0;
            mbusCommHandle.cmd = MBUS_QUERY_CMD;
            mbusCommHandle.addr = mbusDevice->address;
            mbusCommHandle.device = mbusDevice;
            mbusDevice->requests += 1;

            coloredMsg(LOG_YELLOW, true, "mbc mcr [%d] new request %s R:%d F:%d GRC:%d GEC:%d", 
                    mbusCommHandle.requestId,
                    mbusDevice->deviceName, 
                    mbusDevice->requests, 
                    mbusDevice->failures, 
                    mbusCommStats.requestCnt,
                    mbusCommStats.errorCnt);

            oledPrint(OLED_SCREEN0, mbusDevice->deviceName);
            schAdd(handleRequestEngine, (void*) &mbusCommHandle, 0, 0);
            res = MBCRR_TRIGGERED;   

            mbusCommStats.requestCnt += 1;
        }
    } else {
        res = MBCRR_DISABLED;
    }

    return res;
}


#define PERIOD 60

static uint8_t numOfDevices = 8;
static t_mbusDevice devices[] = {
    {
        .deviceName = "TotalPower",
        .address = 80,
        .consideredField = { 0, 17, -1, -1 },
        .requests = 0,
        .failures = 0,
        .period = PERIOD,
        .delay = 0,
        .waiting = false
    },
    {
        .deviceName = "ComputerPower",
        .address = 85,
        .consideredField = { 0, 4, 2, 3 },
        .requests = 0,
        .failures = 0,
        .period = PERIOD,
        .delay = 0,
        .waiting = false
    },
    {
        .deviceName = "DryerPower",
        .address = 81,
        .consideredField = { 0, 4, 2, 3 },
        .requests = 0,
        .failures = 0,
        .period = PERIOD,
        .delay = 0,
        .waiting = false
    },
    {
        .deviceName = "LaundryPower",
        .address = 82,
        .consideredField = { 0, 4, 2, 3 },
        .requests = 0,
        .failures = 0,
        .period = PERIOD,
        .delay = 0,
        .waiting = false
    },
    {
        .deviceName = "DishwasherPower",
        .address = 83,
        .consideredField = { 0, 4, 2, 3 },
        .requests = 0,
        .failures = 0,
        .period = PERIOD,
        .delay = 0,
        .waiting = false
    },
    {
        .deviceName = "LightPower",
        .address = 84,
        .consideredField = { 0, 4, 2, 3 },
        .requests = 0,
        .failures = 0,
        .period = PERIOD,
        .delay = 0,
        .waiting = false
    },
    {
        .deviceName = "FreezerPower",
        .address = 86,
        .consideredField = { 0, 4, 2, 3 },
        .requests = 0,
        .failures = 0,
        .period = PERIOD,
        .delay = 0,
        .waiting = false
    },
    {
        .deviceName = "FridgePower",
        .address = 87,
        .consideredField = { 0, 4, 2, 3 },
        .requests = 0,
        .failures = 0,
        .period = PERIOD,
        .delay = 0,
        .waiting = false
    }
};


static void triggerMBusRequest(void *handle) {
    static uint8_t deviceIndex = 0;

    if (devices[deviceIndex].waiting) {
        e_mbusCommRequestResult r = mbusCommRequest(&(devices[deviceIndex]));
        if (r == MBCRR_TRIGGERED) {
            devices[deviceIndex].waiting = false;
            deviceIndex++;
        }
    } else {
        deviceIndex++;
    }
    if (deviceIndex >= numOfDevices) {
        deviceIndex = 0;
    }
}


static void mbusCommScheduler(void *handle) {
    static uint8_t state = 0;

    switch (state) {
        case 0:
            if (isNetworkAvailable()) {
                coloredMsg(LOG_YELLOW, true, "mbc mcs activate scheduler by network");
                schAdd(triggerMBusRequest, NULL, 0, 100);
                state = 2;
            }
            break;

        case 1:
            if (mbusCommEnabled) {
                coloredMsg(LOG_YELLOW, true, "mbc mcs activate scheduler by request");
                schAdd(triggerMBusRequest, NULL, 0, 100);
                state = 2;
            }
            break;

        case 2:
            if (! isNetworkAvailable()) {
                coloredMsg(LOG_YELLOW, true, "mbc mcs deactivate scheduler by network");
                schDel(triggerMBusRequest, NULL);
                loopDisable();
                state = 0;
            }
            if (! mbusCommEnabled) {
                coloredMsg(LOG_YELLOW, true, "mbc mcs deactivate scheduler by request");
                schDel(triggerMBusRequest, NULL);
                loopDisable();
                state = 1;
            }
            for (uint8_t i = 0; i < numOfDevices; i++) {
                devices[i].delay -= 1;
                if (devices[i].delay <= 0) {
                    devices[i].delay = devices[i].period;
                    devices[i].waiting = true;
                    coloredMsg(LOG_YELLOW, false, "mbc mcs scheduled: %s", devices[i].deviceName);
                }
            }
            break;
    }
}

void mbusCommInit() {
    coloredMsg(LOG_GREEN, true, "mbc mci initializing Meterbus communication");
    schAdd(mbusCommScheduler, NULL, 0, 1000);
}