I have a 3.7 v LiPO battery with an FST connector that I have plugged into the ESP32 Thing. It will not boot up even though I’ve confirmed the batter is fully charged. I charged the battery with the Thing overnight and when I unplug the USB connector, the Thing just goes dark, no power light, no nothing. Am I missing something here?
Which ESP32 Thing are you using? (We have several different versions.) Also, what battery are you using?
If you can provide the SparkFun part numbers for both and post some photos of your setup that would be helpful.
TS-Chris:
Which ESP32 Thing are you using? (We have several different versions.) Also, what battery are you using?If you can provide the SparkFun part numbers for both and post some photos of your setup that would be helpful.
Attached are pictures the ESP32 Thing along with the battery. The battery charged just fine up to 3.775 V plugged in to the Thing and the USB cable inserted. If I remove the USB cable, the Thing shuts down. Should it not keep working with the battery plugged in as charged?
Looking at the picture, that battery has the wrong polarity for that board. The red wire should connect to the pin marked with the + symbol.
/mike
I thought so too, but it is a standard JST connector and the board charged the battery to its full potential.
I looked at various 3.7v LiPo batteries and almost all had the same polarity. I looked at the ones offered by Sparkfun and theirs had polarity that matched the Thing. I went ahead and clipped the battery leads and reversed the polarity of the connector and of course, the Thing boots and is working properly. Is there some standard for these JST connectors that specifies the polarity of the connector?
There’s no universal standard but all SparkFun supplied batteries and boards use the same polarity.