Powering Lopy4 with solar panel
-
I have a project to read rs485 sensor using lopy4, send the value via lorawan, and light sleep it. I also add a solar charging system to charge the li-ion battery, here is wiring diagram
.I get a problem when solar charging active, lopy stop sends payload and display an error in REPL,.
does anyone have any ideas to solve this problem?
-
@Gusti-Made-Arya-Wijaya I just looked the details for this little board.
I do not believe that the TP4056 is suitable for your requirements.
The documentation I found says that the module is not suitable for simulataneously charging a battery and supplying a load.
-
@tuftec said in Powering Lopy4 with solar panel:
@Gusti-Made-Arya-Wijaya how are you feeding power into the LoPy? via the Vin pin? Do not power it through the 3V3 pin.
Switch mode power regulators can be quite noisy (electrically). You should use good quality filtering/bypass caps as close as possible to LoPy module.
I have fount a mixture of 10uF(or more) tant and 100nF monolithic cap works most of the time.I powering it via Vin Pin, can you guide me how to add capacitor on my Lopy?
-
@jcaron yes I got it, but I don't know yet what additional components I need. can I use TP4056? its board has a separated pin for Vout and Vbat
-
@Gusti-Made-Arya-Wijaya how are you feeding power into the LoPy? via the Vin pin? Do not power it through the 3V3 pin.
Switch mode power regulators can be quite noisy (electrically). You should use good quality filtering/bypass caps as close as possible to LoPy module.
I have fount a mixture of 10uF(or more) tant and 100nF monolithic cap works most of the time.
-
@Gusti-Made-Arya-Wijaya I'm not sure you are supposed to connect the load to the same pins as the battery. Charging modules usually have separate pins for the battery and the load. Most TP5100 modules I find seem to only address charging of a battery rather than powering a load at the same time. It's probably possible adding a few additional components, but that's out of my league...
