Hopefully this isn't pebcak, but I noticed something bugish in the current emonTH_DHT22_DS18B20 sketch. After connecting the DS12B20 and updating the sketch to change the node number, the device would hang with led on. I added some short pauses after each setup phase for troubleshooting and found it was hanging at this line:
if (DHT22_status==1) Serial.println("DS18B20 and DHT22 found, assuming DS18B20 is external sensor");
looking where all the power saving goodies are, commenting the following line lets the device start.. so this leads me to believe that writing to a disabled serial port causes a hang.
if (debug==0) power_usart0_disable(); //disable serial UART
I then proceeded to:
if ((debug==1) && (DHT22_status==1)) Serial.println("DS18B20 and DHT22 found, assuming DS18B20 is external sensor");
and the unit now works with the serial port disabled.
I'm totally new at all things arduino so I'm looking for someone to confirm my thoughts here.
Cheers,
B
Re: emonTH hangs with DHT22 and external DS18B20 connected and debug off
I have same problem- will try this solution. Thanks!
Re: emonTH hangs with DHT22 and external DS18B20 connected and debug off
Thanks for this, looks like you have found a bug. I will test and merge this fix into the code.
Thanks a lot,
Re: emonTH hangs with DHT22 and external DS18B20 connected and debug off
Fix has been merged into github emonth code. Thanks a lot
Re: emonTH hangs with DHT22 and external DS18B20 connected and debug off
My pleasure!
Was good to get in there and have a look under the hood.