How to make sense of received Struct from Arduino via NRF24?
nrf24_is_hard last edited by
Currently I have been at this for days now, and I just don't know how to decode the struct value upon receiving the struct data from my Arduino. I am using Python on the RPi side, both are fitted with the same NRF24L01 and I am using RF24 Library https://github.com/matmany/lib_nrf24 which is forked from BLavery.
So my code on the Arduino side is relatively standard, the Arduino transmits a struct data of sensorName, Air temperature, Air Humidity, Light sensor, soil Moisture, soil Temperature, gas Sensor and motion Sensor to a defined pipe. Apart from sensorName, these are all declared as Integers as I will convert it to float in RPi to shorten the size of the struct, thus the struct size is 31, just 1 byte away from the maximum.
Upon running my code at the RPi, I get all sorts of bytes values and I want to convert it to their actual values, which is integer->float.
RPi code is just something like
receivedMessage= radio.read(receivedMessage,radio.getDynamicPayloadSize()) print(receivedMessage) OUTPUT: different kinds of values [0,2,3,195,0,0,0,etc.]
With a previous small side thing I did a few months ago, I only had to transmit temperature and humidity in a float array, and I did it like this, which works!
DataBytes = 8 receivedMessage=bytearray(DataBytes) radio.read(receivedMessage,radio.getDynamicPayloadSize()) data = struct.unpack('ff', receivedMessage) humidity=data temp=data
So my question is, how would I do the same in the case of receiving struct?