Difference between revisions of "AudioMoth"
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== Hardware ==
== Hardware ==
Revision as of 13:31, 8 April 2020
I have an AudioMoth board, and plan to improve its software:
- https://github.com/OpenAcousticDevices/AudioMoth-Project source code
- general clean-up
- fix white space, remove many of the empty lines (earlier CR/LF mistake?)
- fix sprintf statements
- fix complicated and non-portable casts (sensitive to endianness)
- update tool-chain to newer version
- update gcc
- attempt to make it possible to compile with platformio
- document it and upstream it when it works
- extend functions
- add trigger functionality, maybe a specific bat trigger (high pass filter)?
- crest (instantaneous vs average) trigger?
- save files in sub-directories (per day) instead of a flat filesystem?
The microphone is SPM0408LE5H, datasheet. Can't find much about it's ultrasonic performance. The official graph shows a hint of resonance above 10k so it does have sensitivity. For frequencies higher than the resonance peak the response of a typical microphone drops of with 6 dB/octave. I have been able to record some pipistrelle bats with it (40 - 50 kHz).
The processor is EFM32WG380F256, link
My fork on github: https://github.com/bertrik/AudioMoth-Project
Running the tools
Running the tools (configuration tool, flash tool, etc) requires the --no-sandbox option (at least on my system), for example
IDE for development
A brave attempt for all the steps to get the firmware compiled was written here: https://github.com/OpenAcousticDevices/AudioMoth-Project/wiki/AudioMoth
It compiles and produces a firmware.bin file, but it's not recognized by the flashing tool as a valid file.
Use this platformio.ini file:
[platformio] src_dir = src,fatfs_src include_dir = inc,fatfs_inc [env:default] framework = zephyr platform = siliconlabsefm32 board = efm32wg_stk3800
sudo apt install python3-pip sudo pip3 install platformio sudo pip3 install -U PyYAML