AudioMoth

I plan to buy such a board:

• https://www.openacousticdevices.info/
• https://github.com/OpenAcousticDevices/AudioMoth-Project source code

Hardware

See https://circuithub.com/projects/OpenAcoustics/AudioMoth

• microphone is SPM0408LE5H
• processor is EFM32WG380F256