@stef I'm interested in knowing how you are measuring the transmission errors. are there any parameters like signal strength in NRF24?

@stef I'm interested in knowing how you are measuring the transmission errors. are there any parameters like signal strength in NRF24?

Interesting to know that atmega328 has a temperature sensor!
I'm thinking the calibration doesn't need to be completely manual and shouldn't be requiring us to flash the µC again just to recalibrate. we could connect an I2C sensor just during calibration and disconnect it after calibration is done. the firmware could get data from both internal and external sensors and store the calibration data in eeprom. This data can then be read back to measure properly using internal sensor after deploying.
It is even possible to remove the need to flash the µC after the calibration, if the calibration logic is part of the production firmware itself.