60 lines
661 B
Markdown
60 lines
661 B
Markdown
# counter
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## Preparation
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Update:
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```
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apt update
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apt upgrade
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apt autoremove
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```
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Purge everything not required:
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```
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apt purge triggerhappy bluez wpasupplicant modemmanager avahi-daemon
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apt autoremove
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```
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Disable Bluetooth and WiFi at boot, put these lines in `/boot/firmware/config.txt`:
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```
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dtoverlay=disable-wifi
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dtoverlay=disable-bt
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```
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Install build chain and kernel headers:
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```
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apt install build-essential raspberrypi-kernel-headers git
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```
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## Test LEDs:
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GPIO26 is red, GPIO21 is blue:
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Blue on:
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```
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pinctrl set 21 op dh
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```
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Blue off:
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```
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pinctrl set 21 op dl
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```
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Red on:
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```
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pinctrl set 26 op dh
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```
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Red off:
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```
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pinctrl set 26 op dl
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```
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