MicroPython Forum

If you are worried about fire from a heater that is left on from a crashed board, I’d add a separate failsafe independent circuit which can sever the power in an emergency. Something as simple as an attiny + temp sensor + relay. Or maybe the all in one W1209 board. But it only has a small relay, so ...

I haven't touched it in a while, but I'd really like to get this one working: https://github.com/mcauser/BLUE_BUTTON_F103RET6 Costs 4x more than the $3 "Blue Pill", but gives you 512 KByte Flash over the 64 KByte on the blue pill and a bunch more features and IO. I gave it the name "Blue Button" as ...

Sensing sound from a speaker -> Sensing RF from a doorbell transmitter Your doorbell button is most likely a cheap ASK/OOK transmitter, operating on either 315 or 433.92 MHz. I recently made an ESP8266 based project which listens for RF packets emitted from my doorbell and urequest posts them to a ...

Another option is to use one of those 18650 power bricks. https://www.aliexpress.com/item/2017-New-Portable-Power-Bank-18650-External-Backup-Battery-Charger-With-Key-Chain-Factory-Price/32828507666.html Consisting of a micro-usb for charging, usb-a for powering your device and comes in various prett...

Not to be confused with rpitx, which is a hack that can turn a raspberry pi into a crude transmitter using nothing more than a GPIO pin (and a bandpass filter).

I recently built an ESP8266 project using two of those cheap ASK/OOK modules and couldn't find any suitable libraries. There's a few raspi / arduino libraries which add their own protocols which you could use for inspiration. eg. rpi-rf, rc-switch, radiohead, etc. For TX, depending on the complexity...

There is the OneWire driver:
http://docs.micropython.org/en/latest/e ... ire-driver
https://github.com/micropython/micropyt ... rs/onewire

Should be the same ESP8266EX chip in all of the ESP-xxx modules. Some are configured with more flash memory. Some expose additional pins. Some have a metal can / shielding. See http://esp8266.net/ for more specifics. IPEX / U.FL connectors are only rated for a small number of reconnects. Maybe 20-30...

Could you add a few 5.5V super capacitors acting as a battery/ups and monitor the voltage on the analog pin and flick a relay to power down the device once the voltage drops below a threshold? The relay would be wired normally open, and you'd have to bypass it to boot, but once booted, hold it close...