Extension Modules
Voltage Regulator 3.3-volt (Troyka Module)
Make stable 3.3 V out of any input in 4.4 to 20 V range
€5,95
Wi-Fi Modem (Troyka Module)
A ESP8266 module coming with slave AT-commands firmware to bring you internet connection; re-programmable though
€15,95
Wide-Range Gas Sensor MQ-2 (Troyka Module)
Detect propane, butane, methane, and hydrogen leaks
€6,95