I added the branch "NODEMCU_74HC595" branch that uses a NodeMCU, 74HC595 ShiftRegister and an 8Ch 5V Relay board. Since the WiFi connectitivity was quite poor I added an external antenna. Follow the instructions of the OpenSprinkler User Manualĭistributed under the GNU General Public License license.Press the RST button of the ESP12F_Relay_X4 board.To activate the Flash-Mode Press and hold Button 2 until the reset button on the ESP12F_Relay_X4 board was also pressed.In PlatformIO select the "esp12f_4ch_relay_board" task of the Project.TRU COMPONENTS TC-9065652 Universal enclosure, in case you want to place the transformator into the enclosure) Important: If you want to turn on the transformer via a relay (as OpenSprinkler Master Zone) you should consider to use a "RC Circuit" aka "Snubber" to protect the relay contacts.Įnclosure (e.g. 24V~Bell-Transformer, in case you use 24V AC valves.) Wiring: TTL-Adapter ESP12F_Relay_X4 (only needed during programming):.Assure that the Adapter is set to 3.3V (in case it supports also 5V) A DIY Sprinkler Controller Using An ESP8266 2 Comments by: Jenny List There is something strangely amusing about the idea of a sprinkler system relying on a cloud.IO15 Button 3 3.3V (IO15 has an external pull down resistor on the board!).IO0 Button 2 GND (IO0 has an external pull up resistor on the board!).Wiring: ESP12F_Relay_X4 Button Powering:.It's also important to use a rechargeable battery LIR2332! Since this is a 5V module it's important to remove the pull up resistors (5V!) on SDA and SCL.
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