Hello from south of France.
We reached 40°C yesterday afternoon, my outdoor EmonTx V3.4 + Huzzah WiFi breakout is in a closed enclosure in full sun and… It seems it didn’t like it.
The problem seems to be around power supply and the Huzzah WiFi breakout.
Once the EmonTx is plugged in (on my desk) with both AC and DC (checked, correct 5V) and I plug the Huzzah breakout in, the module blinks a couple of times then lights up (Wi-Fi is OK, I can ping it).
The breakout gets very hot near the UART connector (don’t know if it was the case before).
After a very short time (2 to 6 seconds, seems to depend on how the breakout is hot), it goes down (no more light, no more Wi-Fi).
I have to remove it and plug it back in to work again ; if I don’t wait enough for it to cool down a bit, it doesn’t boot (no blinking LED at all).
In order to check EmonTx was correctly booting, I plugged a USB-UART interface and after a reset, here’s what I get:
emonTx V3.4 Discrete Sampling V2.90 OpenEnergyMonitor.org No EEPROM config RFM69CW Node: 7 Freq: 433Mhz Group: 210 POST…..wait 10s ‘+++’ then [Enter] for RF config mode CT 1 Cal 90.90 CT 2 Cal 90.90 CT 3 Cal 90.90 CT 4 Cal 16.67 RMS Voltage on AC-AC is: ~266V AC-AC detected - Real Power measure enabled assuming pwr from AC-AC (jumper closed) Vcal: 268.97 Phase Shift: 1.70 NO CT’s detected No temperature sensor CT1 CT2 CT3 CT4 VRMS/BATT PULSE ct1:260,ct2:0,ct3:0,ct4:0,vrms:26311,pulse:0 ct1:23,ct2:0,ct3:0,ct4:0,vrms:26309,pulse:0 ct1:17,ct2:0,ct3:0,ct4:0,vrms:26305,pulse:0
I’ve double-checked, the USB power is OK (5V on the UART when Huzzah breakout plugged in) and the jumper is open (removed).
If I plug the AC cable only, the EmonTx doesn’t boot (no light). Unless I close the jumper (but this way the Huzzah module cannot boot).
If I connect the Huzzah Wi-Fi breakout to my UART interface, it boots correctly then stops, exactly like when it’s connected to the EmontTx.
I think the Huzzah is the culprit.
Any idea of additional tests I could do to sort this out?
I’m going to buy a new breakout module (I can’t find them anymore on the shop) then I’ll have to program it (with EmonESP).
Anything I should think of now (while ordering stuff)?