The new AudioMoth 1.2.0 with firmware version 1.5.0 on-wards can be adapted to be compatible with external electret condenser mono microphones, commonly known as plug-in powered (PIP) microphones.
To adapt the hardware, you'll need the 3.5 mm jack socket (SJ2-35464A-SMT-TR), which can be soldered to the exposed pads on the front AudioMoth surface.
The 3.5 mm jack socket can be sourced from a number of suppliers here.
PIP microphone assemblies are available, such as the Primo EM258 or they can be built from components. AudioMoth 1.2.0 can be used with a wide variety of differently wired 3.5 mm jack plugs. To find out more, read our full application note on using AudioMoth with external microphones here.
application note link broken, could you update? @Andy
I've found a waterproof electret omnidirectional microphone I would like to try with the AudioMoth 1.2.0 - https://www.digikey.com/en/products/detail/cui-devices/CME-1538-100LB/2364631. It comes with leads (ground & signal), but in the application note it says, "The jack detect must be pulled low to enable the external microphone." Am I correct to solder a jumper to ground from the jack detect to permanently activate the external microphone? I'd also appreciate any thoughts on this microphone if anyone has any. Thanks.