Three Channel WiFi Relay / Thermostat Board

  Three Channel WiFi Relay / Thermostat Board The Three Channel WiFi Relay / Thermostat Board is a open software/hardware multi-purpose relay board based on the ESP8266 WiFi SoC. It can control up to three AC or DC loads over the Internet using web UI or MQTT.  Highlights Powered by the popular ESP8266 WiFi SoC On-board power…

Funky v3

Funky v3 This is v3 of my “Funky” Arduino clone, specifically designed to be small, with on-board radio module and for low power applications. Highlights Board size is 20×21.2mm (0.78″x0.83″) Weighs 3 grams (0.11 oz) Compatible with Arduino IDE ATMega32U4 MCU, the same as processor used in the popular Arduino Leonardo No need for external programmer to…

How-to: Rasbperry Pi – Install mosquitto with websockets enable

#https://goochgooch.wordpress.com/2014/08/01/building-mosquitto-1-4/ sudo apt-get update && sudo apt-get install build-essential rpm cmake libssl-dev mercurial uuid-dev xsltproc docbook-xsl mkdir src cd src wget http://git.warmcat.com/cgi-bin/cgit/libwebsockets/snapshot/libwebsockets-1.3-chrome37-firefox30.tar.gz tar -xzvf libwebsockets-1.3-chrome37-firefox30.tar.gz cd libwebsockets-1.3-chrome37-firefox30/ mkdir build cd build sudo cmake .. -DOPENSSL_ROOT_DIR=/usr/bin/openssl sudo make sudo make install cd ~/src hg clone https://bitbucket.org/oojah/mosquitto cd mosquitto/ hg pull && hg update 1.4 nano config.mk…

How-to: Raspbian read-only root-fs

The following instructions will convert your Raspbian to R/O Source: http://blog.gegg.us/2014/03/a-raspbian-read-only-root-fs-howto/    Remove some stuff which is not needed or unsuitable for readonly operation: sudo su apt-get remove –purge  logrotate dphys-swapfile apt-get autoremove –purge Install busybox syslog instead of rsyslog: The reason for doing this is because we do not want logfiles, but we want to…

LTC3108 Energy harvesting breakout board

The LTC3108  is a highly integrated DC/DC converter ideal for harvesting and managing surplus energy from extremely low input voltage sources such as TEGs (thermoelectric generators), thermopiles and small solar cells. The step-up topology operates from input voltages as low as 20mV. Using a small step-up transformer, the LTC3108 provides a complete power management solution for wireless sensing and data acquisition.…

Funky v2

The “Funky v2” is a miniature open source/hardware cut-down clone of the Arduino Leonardo  with RFM12B radio module. It is intended as low power, battery operated remote sensing node with USB interface. Due to the miniature size, only few carefully selected pins are available at the side header, none the less that is more than sufficient to interface several sensors…

Micro Internet of Things Gateway (uIoT)

The Micro Internet of Things Gateway (uIoT) is a Atmega328 + ENC28J60 solution, one of many using this combination of hardware, but still unique with its miniature size (38mm x 28 mm and 15 mm in height). The original board is designed by Simon K. and I have his permission to develop it further and…

RFM2Pi board v1 rev3

Note: There is a more advanced wiki at this address: http://wiki.openenergymonitor.org/index.php?title=Raspberry_Pi The RFM2Pi board is an Attiny84+RFM12b based expansion board that plugs on top the Raspberry Pi‘s GPIO pins and provides serial interface with the RFM12b module. The board is pre-programmed with RFDemo sketch for Attiny84 and will output to Pi’s UART the incoming packets. This revision of the…

Funky v1

The ‘Funky’ Sensor is a miniature ATTiny84 based node with a RFM12b module for wireless communications.  It was originally created by Tobias Floery, and inspired by Jeelab’s JeeNode Micro. I was quite impressed by the small size and usability of the device and asked Tobias for permission to copy and develop further a version of my own. My…

TinySensor v1.4 (discontinued, page for reference only)

TinySensor Documentation Discontinued The TinySensor is a ATTiny84 based multi-purpose board. It is designed to primary serve as a low power, battery operated wireless remote sensor that will measure and transmit data to a remote base at regular intervals. For the purpose, there is a dedicated temperature sensor port (intended for DS18B20 one-wire temperature sensor…