Display with LoRa

Other Hardware Displays
1

Hi

My project is to have 2x Arduinos communicating (sending temp / hum values one way) over LoRa remotely with battery.

For a display on the receiver unit, I'm using the 5510 LCD. This works fine when everything's powered over the computer's USB ports. However, when I supply power from a USB phone charger from the wall, the LCD lights up but no data is displayed. The model is a Leonardo.

When I return it to the computer, I have to upload the sketch again for it to work.

The max power from the LoRa shield is 120mA when transmitting and 11 when receiving. The LCD is 80mA for the LEDs plus power for the LCDs (can't find data on this). Could it be drawing too much amps for the USB phone charger (I've tried a few - 5.3V 2A output, and different cables)?

Thanks

2

If you think any bit of electronics is drawing so much power that its affecting the operation of the Arduino, then measure the supply voltage on the Arduino ..............

3

Thanks. After some mucking around with it, it's one of two things: 1/ I added some resistors to the LCD display which reduced the load or 2/ I changed the pins 0 and 1 to other available pins (or 3/ there was a short circuit which got fixed in the changes.

4

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