3 ms·

There are already a couple of companies doing similar kickstarters I think. But we want this to be a non profit open source project for fun. We are using a GP

There are already a couple of companies doing similar kickstarters I think. But we want this to be a non profit open source project for fun. We are using a GPL license, but if someone wants to eventually sell devices (as long as they obey the GPL) with our code we think that's great.

davidzweig 7y ago
The ESP32 draws quite a lot of current when running BLE (without Wifi), unless that's been fixed recently. IIRC, the TTGO boards have poor low-power design that will kill the 18650 battery in a few days, no matter what you do, that could perhaps be fixed with a small modification though. I have a hardware design that might be an interesting starting point. It's based around nrf52 (Cortex M4F with BLE and nice SDK), 400mah battery, microphone, speaker, 3*4 RGB LED matrix, gyro/accelerometer, NFC. Very small device, 35mm across. Can extend the top of the PCB, add a small OLED screen and a LORA radio. Hitting $30 price point shouldn't be a problem. Email in profile :-) https://photos.app.goo.gl/qUyrRYDrtu2SHsHR9 https://photos.app.goo.gl/qUyrRYDrtu2SHsHR9