OK, I replaced the faulty RFM69 module and made sure with my existing test sketches that the new one works. It still can’t receive the packets sent by the EmonTX transmitter. I have a simple RSSI monitor for the module and it shows a high RSSI burst of about 7 ms every 10 secs so something’s coming from the transmitter and the module does sense it in some way. Also checked with an RTL-SDR stick that the transmitter indeed transmits something. So both sides seem to work at the basic level, but still no frames are received.
I’m using RFM69CW_RF12_Demo_ATmega328.ino as receiver and emonTxV3_4_DiscreteSampling\src\src.ino as transmitter. I only changed the Vcal value (simple voltage calibration with a multimeter) and uploaded it into the EmonTX 3.4. I compiled both using Arduino 1.6.9. I’m stuck. Please help…