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💬 Wireless Module for Capacitive Soil Moisture Sensor v1.2

openhardware.io 18 Jul 2019, 17:30 last edited by

https://www.openhardware.io/view/715/Wireless-Module-for-Capacitive-Soil-Moisture-Sensor-v12
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nrf52832 22 soil moisture 8 e73-2g4m04s 4 capacitive soil moisture 2
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3 months later

Sancho119 26 Oct 2019, 10:19 last edited by

Hello,

Very interesting project !

When I try to put your gerber files in JLCPCB site, there is no view, and no dimensions ?
Is it normal ? which dimensions is required ?

Thanks
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Here is the sketch if anyone can help out. #include <SPI.h> #include <MySensor.h> #define CHILD_ID_LIGHT 0 #define LIGHT_SENSOR_ANALOG_PIN 1 #define NODE_ID 9 int BATTERY_SENSE_PIN = A2; // select the input pin for the battery sense point unsigned long SLEEP_TIME = 30000; // Sleep time between reads (in milliseconds) MySensor gw; MyMessage msg(CHILD_ID_LIGHT, V_LIGHT_LEVEL); int lastLightLevel; int oldBatteryPcnt = 0; void setup() { // use the 1.1 V internal reference //analogReference(INTERNAL); gw.begin(NULL, NODE_ID, false); // Send the sketch version information to the gateway and Controller gw.sendSketchInfo("Soil_Moist_Sensor_grb", "1.15"); // Register all sensors to gateway (they will be created as child devices) gw.present(CHILD_ID_LIGHT, S_LIGHT_LEVEL); } void loop() { int lightLevel = (1023-analogRead(LIGHT_SENSOR_ANALOG_PIN))/10.23; Serial.println(lightLevel); if (lightLevel != lastLightLevel) { gw.send(msg.set(lightLevel)); lastLightLevel = lightLevel; } // get the battery Voltage int sensorValue = analogRead(BATTERY_SENSE_PIN); Serial.println(sensorValue); // 1M, 470K divider across battery and using internal ADC ref of 1.1V // Sense point is bypassed with 0.1 uF cap to reduce noise at that point // ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts // 3.44/1023 = Volts per bit = 0.003363075 - changed without ref volt float batteryV = sensorValue * 0.00305734; int batteryPcnt = sensorValue / 10; Serial.print("Battery Voltage: "); Serial.print(batteryV); Serial.println(" V"); Serial.print("Battery percent: "); Serial.print(batteryPcnt); Serial.println(" %"); if (oldBatteryPcnt != batteryPcnt) { // Power up radio after sleep gw.sendBatteryLevel(batteryPcnt); oldBatteryPcnt = batteryPcnt; } gw.sleep(SLEEP_TIME); }
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Update on the project. New version added to openhardware.io
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Project completed.
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Please Is it possible to buy only PCB? Do you plan also to release your sketch?
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@canossa Sorry for the late response. yeah, since is so compact and you can get it for relatively cheap I opted in for the NRF52. For home automation, I merged MySensors with Domoticz and it works for months now. https://forum.mysensors.org/topic/7836/what-did-you-build-today-pictures/738
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💬 Wireless Module for Capacitive Soil Moisture Sensor v1.2

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