shDAN: small house Data Acquisition Network

BASE - Base Station firmware for Data Acquisition Network

NODE - Data Node for Data Acquisition Network

Topology

Protocol

Messages

At the moment all projects under major re-factoring/code clean-up

RFM12BS radio module

RFM12B wireless FSK transceiver module Si4420/21 RF transmitters RFM12BS ARSSI hack

Atmega 32L - MMR-70 modding

Base station and nodes are built using modified firmware for Atmega 32L based MMR-70 FM Music Transmitter.

Includes different projects:

Modding test

TEST - for testing freshly modified MMR-70s

FM Radio with RDS support firmware

RADIO - Similar to FMBerry, but running on MMR-70's ATmega32 itself instead of Raspberry Pi.

Avrdude on Raspberry Pi

I use RPi as AVR programmer, and this is how it can be done:

1. Install avrdude for Raspberry Pi
2. If you want to use different RPi pin for Reset then edit /usr/local/etc/avrdude.conf, section programmer
3. To save four keystrokes every time when you program AVR add setuid to /usr/local/bin/avrdude, so you will not need to add sudo every time when you want to run make program, make fuses, make reset

Building the firmware

Clone code from github, connect MMR-70 to Raspberry Pi as ISP or whatever you use for avr-gcc/avrdude.

In the project's folder: make to make it, burn ATmega fuses to 8MHz: make fuses (once off operation), upload firmware: make program.

Useful links

• MMR-70 discussion at www.mikrocontroller.net
• MMR-70 as ISP-Programmmer
• How to protect Raspberry Pi GPIOs with a 74LVC244 buffer
• Tera Term useful terminal application
• UART/I2C Peter Fleury's UART/I2C libraries