I’m a new user of a pico explorer board. I bought it to experiment mixing its features together with an rfm95 lora module as a ttn node. I have a couple of garden modules plugged in and separately most devices are now working. Time to start knitting it all together.
I’d like to have an alert sound when a message is received and for this to use the onboard piezo sounder, however the volume is very low and unsuitable for this purpose - in fact I cannot hear it above even a modest amount of background noise as it is so faint.
With nothing else connected to my board and running the test application I get the same disappointing results. Have others found this problem, or perhaps my device is somehow faulty? I even tried adjusting the frequency to try and find a sweet spot but it didn’t help much.
Using the output from GP0 or A0 gives similar results. I find I can get a bit more sound by running an alternative sounder directly from a pico pin. I suspect there is insufficient voltage swing to properly drive the on-board piezo sounder.
Maybe have to investigate an alternative solution.
Kind regards, David.