My home has six emonTH sensors that connect back to a Pi with an RFM69 and the emonhub software. It then forwards sensor readings via MQTT to emonCMS and Home Assistant.
All has been working fine for several years. Other than changing batteries, I’ve had no problems until last night.
At approx 8PM last night the Pi stopped receiving/decoding all but the closest emonTH senders. Initially, I thought it was just one, but over a period of about 12h four of them dropped off - those that are either in the same room as the Pi, or in the next (the Pi sits on a windowsill in a bedroom to give it good comms to all sensors). Two sensors are line of sight except for thin wooden walls (shed and home office), but they have dropped off. The other two are downstairs.
I’ve ordered a replacement RFM69 in the hope that it’s just a failing board, but I wondered if anybody else has seen anything like this.
UPDATE:
I’ve managed to implement a temporary solution by relocating the Pi and the missing sensors so the pressure is off; but I’m still curious to understand what happened.