Software for the esp8266 processor with Arduino IDE
sketch_uptime_thingspeak: a simple sketch to log the hostname and uptime (in miliseconds) of your esp8266 on the thingspeak platform. Described in more detail here.
sketch_lg_heartbeat similar to the previous but sending data to Limitless Garden IOT backend
sketch_lg_i2cscan running an scan for I2C devioces connected to the esp8266, and adding the count of devices to the hearbeat message sent to Limitless Garden.
sketch_lg_i2csoil - reading soil humidity (as capacitance), temperature and light from the I2C Soil Moisture sensor and sending to the sensor data collection on Limitless Garden.
See also the project blog at blog.abarbanell.de/arduino-esp8266 for more details on each of these.