From 55b29741cf1e301c1108dc6a3151cea7a1437cf9 Mon Sep 17 00:00:00 2001
From: Jesse Morgan <jesse@jesterpm.net>
Date: Wed, 6 Apr 2022 07:12:10 -0700
Subject: WIP: Add temp sensor support

---
 flowerpot-device.ino | 61 ++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 54 insertions(+), 7 deletions(-)

diff --git a/flowerpot-device.ino b/flowerpot-device.ino
index e7f6186..3071d73 100644
--- a/flowerpot-device.ino
+++ b/flowerpot-device.ino
@@ -28,6 +28,7 @@
 #include <ESP8266WiFiMulti.h>
 #include <ESP8266HTTPClient.h>
 #include <WiFiClient.h>
+#include <DHT.h>
 
 #include "Seeed_mbedtls.h"
 
@@ -37,7 +38,13 @@
 // IO Pin Configuration
 #define BATTERY_SWITCH D6
 #define MEASURE_SWITCH D8
+#define DHT_PIN        D9
+#define DHT_TYPE       DHT11
 
+// DHT Sensor
+#ifdef HAS_DHT
+  DHT_Unified dht(DHT_PIN, DHT_TYPE);
+#endif
 
 // Wifi
 ESP8266WiFiMulti WiFiMulti;
@@ -111,6 +118,11 @@ void setup() {
   #endif
   digitalWrite(MEASURE_SWITCH, LOW);
 
+  #ifdef HAS_DHT
+    // Initialize DHT sensor
+    dht.begin();
+  #endif
+
   for (uint8_t t = 4; t > 0; t--) {
     Serial.printf("[SETUP] WAIT %d...\n", t);
     Serial.flush();
@@ -122,7 +134,7 @@ void setup() {
   Serial.printf("Key len %d\n", SECRET_KEY_LEN);
 
   WiFi.mode(WIFI_STA);
-  WiFiMulti.addAP("your_network", "your_password?");
+  WiFiMulti.addAP(WIFI_NETWORK, WIFI_PASSWORD);
 
   // Prepare the HMAC context
   mbedtls_md_init(&ctx);
@@ -158,23 +170,58 @@ void loop() {
         float battery_value = 1.0;
       #endif
 
+      float value, r;
+
+      #ifdef TEST_SENSOR
+      while (1) {
+      #endif
+
       // Get the current resistance
       Serial.println("Reading R...");
-      float value = read_value(MEASURE_SWITCH);
+      value = read_value(MEASURE_SWITCH);
       Serial.printf("Raw measure value = %f\n", value);
       value = value * 1024.0 / 938.0;
       Serial.printf("Calibrated measure value = %f\n", value);
-      float r = 320000.0 / value - 320000.0;
+      r = 320000.0 / value - 320000.0;
       Serial.printf("R = %f\n", r);
 
+      #ifdef TEST_SENSOR
+      delay(1000);
+      }
+      #endif
+
+      #ifdef HAS_DHT
+        sensors_event_t event;
+        
+        dht.temperature().getEvent(&event);
+        float temp = event.temperature;
+        
+        dht.humidity().getEvent(&event);
+        float relative_humidity = event.relative_humidity;
+      #endif
+
       // Payload
       const size_t payload_length = 1024;
       char payload[payload_length];
-      int len = snprintf(payload, payload_length,
-          "battery_value=%0.2f&device_id=%08x&value=%0.2f&signature=",
+      int len = snprintf(
+          payload,
+          payload_length,
+          "battery_value=%0.2f&"
+            "device_id=%08x&"
+            "value=%0.2f&"
+            #ifdef HAS_DHT
+            "temperature_value=%0.2f&"
+            "relative_humidity_value=%0.2f&"
+            #endif
+            "signature=",
           battery_value,
           system_get_chip_id(),
-          r);
+          r
+          #ifdef HAS_DHT
+          , temp
+          , relative_humidity
+          #endif
+          );
 
       if (len + 65 <= payload_length) {
         const char* signature = generate_signature(payload, len - 11);
@@ -211,7 +258,7 @@ void loop() {
     #ifdef HAS_BATTERY
       ESP.deepSleep(3600 * 1000000);
     #else
-      ESP.deepSleep(900 * 1000000);
+      delay(900000);
     #endif
   }
 }
-- 
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