I made myself a test monitoring module for thermal chamber tests.
The module makes a bidirectional radio communication with a central station outside the thermal chamber. The chamber varies in temperature between -40 and +80°C with a slope of 1°C/min.
The communication is done with a CC2500 chip and I realized that I was losing messages during the low temperature phases.
I made different tests and in the end I have two modules in the thermal chamber, one that only transmits and the other that only receives. I have a second module that only receives outside, so always at 25°C.
With this last test the module which is outside receives all the frames of the transmitter module but the module of reception which is in the room loses frames when we pass to low temperature
Would you have an idea why I lose frames at low temperature (-10 to -20°C) while the CC2500 is qualified until -40°C ?
Sometimes I receive frames when we are at -40°C but sometimes I have to wait to come back in positive or restart the module electrically to receive frames.
Thanks for your help