New build, work in progress.
In preparation of moving sensors to esp8266 nodes, I cobbled this code together while waiting for the hardware to arrive. Hasn't been tested yet.
Instead of having the rPi's i2c bus run all the way down to the plants, which I think is too long and corrupting data, my new plan is to have an esp8266 down by the plants with the AM2315 temp/humi sensor and an ADS1115 with 4 capacitive soil moisture sensors. Connected over wifi with MQTT.
Instead of having the rPi's i2c bus run all the way down to the plants, which I think is too long and corrupting data, my new plan is to have an esp8266 down by the plants with the AM2315 temp/humi sensor and an ADS1115 with 4 capacitive soil moisture sensors. Connected over wifi with MQTT.
Code: Select all
//for WIFI
#include <ESP8266WiFi.h>
const char* ssid = "teehee"; //Enter SSID
const char* password = "poopoo"; //Enter Password
IPAddress staticIP(192,168,2,50);
IPAddress gateway(192,168,0,1);
IPAddress subnet(255,255,0,0);
//for i2c
#include <Wire.h>
//for MQTT
#include <PubSubClient.h>
WiFiClient espClient;
PubSubClient client(espClient);
const char* mqtt_server = "192.168.2.1";
#define MSG_BUFFER_SIZE (50)
char msg[MSG_BUFFER_SIZE];
char tempString[8];
//for soil moisture
#include <Adafruit_ADS1015.h>
Adafruit_ADS1115 ads(0x48);
//for am2315
#include <Adafruit_AM2315.h>
Adafruit_AM2315 am2315;
//this device's name
const char* espName = "espOne";
//loop delay ms
const int interval = 5000;
void wifi_setup() {
WiFi.persistent( false );
WiFi.begin(ssid, password);
WiFi.config(staticIP, gateway, subnet);
WiFi.setOutputPower(10.0); //0 to 20.5
while (WiFi.status() != WL_CONNECTED)
{
delay(500);
Serial.print("*");
}
}
void i2c_setup()
{
Wire.begin();
ads.begin();
if (! am2315.begin()) {
Serial.println("am2315 not found, check wiring & pullups!");
while (1);
}
}
void mqtt_connect() {
// Loop until we're reconnected
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
// Attempt to connect
if (client.connect(espName)) {
Serial.println("connected");
// Once connected, publish an announcement...
client.publish("outTopic", "espOne Online");
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
// Wait 5 seconds before retrying
delay(5000);
}
}
}
void mqtt_setup()
{
client.setServer(mqtt_server, 1883);
client.setCallback(callback);
mqtt_connect();
}
void read_ads()
{
int16_t adc0, adc1, adc2, adc3;
adc0 = ads.readADC_SingleEnded(0);
adc1 = ads.readADC_SingleEnded(1);
adc2 = ads.readADC_SingleEnded(2);
adc3 = ads.readADC_SingleEnded(3);
dtostrf(adc0, 4, 1, tempString);
client.publish("soil/moisture/0", tempString);
dtostrf(adc1, 4, 1, tempString);
client.publish("soil/moisture/1", tempString);
dtostrf(adc2, 4, 1, tempString);
client.publish("soil/moisture/2", tempString);
dtostrf(adc3, 4, 1, tempString);
client.publish("soil/moisture/3", tempString);
}
void read_am2315()
{
float temperature, humidity;
if (! am2315.readTemperatureAndHumidity(&temperature, &humidity)) {
Serial.println("Failed to read data from AM2315");
return;
}
Serial.print("Temp *C: "); Serial.println(temperature);
Serial.print("Hum %: "); Serial.println(humidity);
dtostrf(temperature, 4, 1, tempString);
client.publish("canopy/temperature", tempString);
dtostrf(humidity, 4, 1, tempString);
client.publish("canopy/humidity", tempString);
}
void callback(char* topic, byte* payload, unsigned int length) {
Serial.print("Message arrived [");
Serial.print(topic);
Serial.print("] ");
for (int i = 0; i < length; i++) {
Serial.print((char)payload[i]);
}
Serial.println();
//this is where we received a message and need to reply?
}
void setup()
{
Serial.begin(115200);
wifi_setup();
i2c_setup();
mqtt_setup();
}
void loop() {
unsigned long lastMsg = 0;
unsigned long now = 0;
if (WiFi.status() != WL_CONNECTED) {
wifi_setup();
}
if (!client.connected()) {
mqtt_connect();
}
now = millis();
if (now - lastMsg > interval) {
lastMsg = now;
read_ads();
read_am2315();
}
client.loop();
}
What?!
That never happens. You're lying.
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