433 data transmission validation of TPMS NTM88 ic

[nikita_kanade]

Hello,

I am trying to transmit data on 433 frequency. For that I used NTM88_starter_Project as reference.

I want to validate the data transmission by receiving the data. But data is not received to receiver.

Receiver setting are like

frequency: 433KHz

Frequency deviation: 100000Hz

Demodulation: FSK

Data length: 20 bytes

Chip rate : 19200

Decoding style: MANCHESTER _ MANCHESTER

IF:200000Hz

Channel filter: 60000

I used IREC software and it hardware to receive data.

Is any another way to check data transmission like connecting any pin to DSO and obtained waveform.

While debugging the code

I check 433_interrupt flag it set properly

[TomasVaverka]

Hello Nikita,

I would recommend you in priority to set the device in OOK modulation and to poll the RF out by means of an oscilloscope tied to the RF line. You can also verify that the VREG is rising up during transmission.

If this check turns out ok (meaning the SW is ok), then you will have to pursue with the RF link itself (matching network, range assessment, etc..)

Best regards,
Tomas