diff --git a/src/longframe.ts b/src/longframe.ts
index aa287a2..985f0f2 100644
--- a/src/longframe.ts
+++ b/src/longframe.ts
@@ -17,6 +17,10 @@ export namespace MeterbusLibLongFrame {
             this._fixedDataHeader = new FixedDataHeader(this._telegram.slice(7, 19))
             this._fixedDataHeader.parse()
         }
+
+        getJSON() : string {
+            return JSON.stringify(this)
+        }
     }
 
     export class FixedDataHeader {
diff --git a/src/meterbus.test.ts b/src/meterbus.test.ts
index 6e0092d..8f3c386 100644
--- a/src/meterbus.test.ts
+++ b/src/meterbus.test.ts
@@ -179,6 +179,9 @@ describe('The Meterbus Library', () => {
             expect((telegram.frame as MeterbusLibLongFrame.LongFrame).fixedDataHeader.signature)
               .to.deep.equal(new Uint8Array([0,0]))
         })
+        it('should print itself as json', () => {
+            console.log((telegram.frame as MeterbusLibLongFrame.LongFrame).getJSON())
+        })
     })
 
 })
\ No newline at end of file
diff --git a/src/utils.test.ts b/src/utils.test.ts
index a00d03d..ae8819d 100644
--- a/src/utils.test.ts
+++ b/src/utils.test.ts
@@ -8,21 +8,21 @@ const expect = chai.expect
 
 describe('The Meterbus Library Utils', () => {
     it('should convert a bcd to a number (10203)', () => {
-        expect(MeterbusLibUtils.bcd([1, 2, 3])).to.equal(10203)
+        expect(MeterbusLibUtils.bcd(new Uint8Array([1, 2, 3]))).to.equal(10203)
     })
     it('should convert a bcd to a number (0010203)', () => {
-        expect(MeterbusLibUtils.bcd([0, 1, 2, 3])).to.equal(10203)
+        expect(MeterbusLibUtils.bcd(new Uint8Array([0, 1, 2, 3]))).to.equal(10203)
     })
     it('should convert a bcd to a number (0)', () => {
-        expect(MeterbusLibUtils.bcd([0, 0, 0])).to.equal(0)
+        expect(MeterbusLibUtils.bcd(new Uint8Array([0, 0, 0]))).to.equal(0)
     })
     it('should convert a bcd to a number (0)', () => {
-        expect(MeterbusLibUtils.bcd([0, 0, 0, 0])).to.equal(0)
+        expect(MeterbusLibUtils.bcd(new Uint8Array([0, 0, 0, 0]))).to.equal(0)
     })
     it('should convert a bcd to a number (99999999)', () => {
-        expect(MeterbusLibUtils.bcd([0x99, 0x99, 0x99, 0x99])).to.equal(99999999)
+        expect(MeterbusLibUtils.bcd(new Uint8Array([0x99, 0x99, 0x99, 0x99]))).to.equal(99999999)
     })
     it('should convert two number to manufacturer code', () => {
-        expect(MeterbusLibUtils.manufCode([0x2e, 0x19])).to.equal("FIN")
+        expect(MeterbusLibUtils.manufCode(new Uint8Array([0x2e, 0x19]))).to.equal("FIN")
     })
 })