RE: [Pool Water Monitoring] #9 Arduino MKR 1300 WAN battery monitoring

skruglewicz — Wed, 19 Jan 2022 19:06:36 GMT

Hi [mention:441493a9ae654e5e94d5ecbfb7c590be:e9ed411860ed4f2ba0265705b8793d05]

Very infesting blog on using batteries with the MKR WAN 1300. I will be sure to check it out to check my batteries for my challenge.

I've run into an issue trying to get the 3v battery connector to work with a temp sensor described in my 4th blog

/challenges-projects/design-challenges/just-encase/b/blog/posts/blog4testing

I can get the battery working without the USB connected.. I've tried the blink sketch and my unit test sketch for sending LoRa data referred to in my 3rd blog

/challenges-projects/design-challenges/just-encase/b/blog/posts/blog4testing

in blog#4 I've been able to get the sender sketch to work with the USB cable connected
But, when I disconnect the USB cable it stops sensing temperature ? I know this because my LoRa receiver is not getting data.
Is this because the temp sensor is requiring 5V?
My guess is that the 5v Pin on the MKR is not putting out 5v when a 3V battery is connected!

Now I'm unable to run my sketch on batteries and my design is to run sensors in the enclosure on battery power!!!

Any idea on what I could do?

I do have a Power Supply Module MB 102(5V/3V) (Displayed below).

Could I power my temp sensor circuit using it and run the yellow wire over to the MKR pin 2?

Thanks in advance for your insight

[mention:6554aa80b5274fc6a0375c92988b98fa:e9ed411860ed4f2ba0265705b8793d05] AKA Steve K