Experimenting with Atmega328 OTA update over RFM69 wireless link, works fine. Remaining is to implement this+GUI on the TFT32 esp32-rfm69 gateway project, so it can reflash the relay actuators if needed.
Atmega328 OTA update over RFM69 wireless link
Internet connected fire/smoke alarm project
An internet connected smoke alarm module that retrofits into cheap detectors – dedicated hardware replacing my Funky-based DIY version.
High security key fob project
Building a high security key fob around Atmel’s ATSHA204 – because rolling code fobs turn out to be quite hackable.
FOTA update without external flash for Atmega32U4 + RFM69
FOTA for the ATmega32U4 + RFM69 without external flash – the dual-bank trick that Moteino solves with a flash chip, done without one.
New ATMega32U4 board to use with nRF24L01
A new ATmega32U4 board for the nRF24L01+ – USB, 8MHz/3.3V, and a boost regulator that runs the whole thing off a single AAA battery.
Crazy high frequency PWM with ATMega32U4
Toying with Timer 4 on the ATmega32U4: PLL-driven PWM up to 8MHz, verified on the scope.
Power saving techniques on the Atmega32u4
Power saving techniques on the ATmega32U4 – getting the Funky 2 close to the ATtiny84’s sleep currents for long battery life.
Update on the Atmega32u4 based new Funky
Final board layout for the ATmega32U4 based Funky 2 – this project is pushing my hobby-level PCB skills hard, in a good way.
Atmega32U4 based micro node with RFM12B
Rethinking the Funky: an ATmega32U4 micro node with RFM12B – native USB means no ISP programmer and no core installs for users.
Flashing Arduino from SD card
Flashing an Arduino from SD card or over TFTP – remote sketch uploading for nodes you can’t easily reach with a USB cable.