ESP8266 Community Forum

Hi,

I have made a code example from the SDK and compiled on windows, which reads a temp/hym. sensor and sends it to the internet.
It did work for a long time running on battery, then i added the ADC and measured the batt voltage, now the upload stops after short time ~ some hours.
I have set the upload time to 15min between and goes into deep sleep.
Normally it wakes correct, and also before the ADC was added.

Anyone there has a clue?
I recall the SDK to be 1.0.0 or 1.0.5.

I am litle unsure if i have to update the module itself when i flash directly from eclipse, will it then update the firmware in the module?
And also what is the difference in the different flash option ~ Flash file ~ Flash all etc.?

BR
Kasper

The ADC can only handle up to 1V input so you need a voltage divider on your measured signal to make the maximum input 1V.

There is also a command to read the Vcc voltage level so you could be using that instead of trying to directly read the battery level.

I am doing something similar and uploading temperature, battery voltage and supply voltage to thingspeak. In order for the ESP to read the analog values I found that they had to be taken before WiFi was connected otherwise the ESP would force reboot or get stuck in a boot loop. For my application simply taking the readings in the first lines of code before WiFi had connected was enough to make it stable.

You can monitor the battery level using the readvdd33 function. See this post for info :-
http://www.esp8266.com/viewtopic.php?f=33&t=2485