From 274a84ba9852cc453d31c54f761ba18541f951a7 Mon Sep 17 00:00:00 2001
From: dakkar <dakkar@thenautilus.net>
Date: Mon, 2 Apr 2018 16:53:40 +0100
Subject: trying to do BLE

---
 sensor/thermostat.ino | 138 +++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 121 insertions(+), 17 deletions(-)

(limited to 'sensor/thermostat.ino')

diff --git a/sensor/thermostat.ino b/sensor/thermostat.ino
index 63f87f0..ba98158 100644
--- a/sensor/thermostat.ino
+++ b/sensor/thermostat.ino
@@ -1,36 +1,140 @@
+#include <string>
 #include <Wire.h>  
 #include "SSD1306.h"
 #include "DHTesp.h"
+#include "BLEDevice.h"
+
+static BLEUUID thermo_service_uuid("11111111-2222-3333-4444-000000000000");
+static BLEUUID thermo_temp_uuid("11111111-2222-3333-4444-000000000001");
+static BLEUUID thermo_time_uuid("11111111-2222-3333-4444-000000000002");
+
+#define DEFAULT_SLEEP_TIME 60
+/* Conversion factor for micro seconds to seconds */
+#define uS_TO_S_FACTOR 1000000
 
 SSD1306 display(0x3c, 5, 4);
 DHTesp dht;
 
-void setup() {
-  dht.setup(13,DHTesp::AUTO_DETECT);
+void show(String x) {
+  display.clear();
+  display.drawString(0,0,x);
+  display.display();
+}
+
+class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks {
+ public:
+  BLEAddress* pServerAddress;
+
+ MyAdvertisedDeviceCallbacks() :
+  BLEAdvertisedDeviceCallbacks(),
+    pServerAddress(0)
+      {}
+  
+  void onResult(BLEAdvertisedDevice advertisedDevice) {
+    // We have found a device, let us now see if it contains the service we are looking for.
+    String results = "Found: \n";
+    results += String(advertisedDevice.getAddress().toString().c_str());
+    show(results);
+
+    if (advertisedDevice.haveName() && advertisedDevice.getName() == "termostore") {
+      advertisedDevice.getScan()->stop();
+
+      pServerAddress = new BLEAddress(advertisedDevice.getAddress());
+
+    } // Found our server
+  } // onResult
+}; // MyAdvertisedDeviceCallbacks
+
+void read_sensor(float* humidity, float* temperature) {
+  dht.setup(13,DHTesp::DHT11);
+
+  while (1) {
+    delay(dht.getMinimumSamplingPeriod());
+    *humidity = dht.getHumidity();
+    *temperature = dht.getTemperature();
+
+    String data = "";
+    data += *humidity;
+    data += " ";
+    data += *temperature;
+    data += " ";
+    data += dht.getStatusString();
+    show(data);
 
+    if (dht.getStatus() != DHTesp::ERROR_TIMEOUT) return;
+  }
+}
+
+uint32_t send_data_and_get_time(BLEAddress* pAddress,String* data) {
+  BLEClient* pClient  = BLEDevice::createClient();
+  show("Sc");
+  pClient->connect(*pAddress);
+  show("SC");
+  BLERemoteService* pThermoService = pClient->getService(thermo_service_uuid);
+  BLERemoteCharacteristic* pTemp = pThermoService->getCharacteristic(thermo_temp_uuid);
+  show("SCw");
+  pTemp->writeValue(data->c_str(),data->length());
+  show("SCWr");
+  BLERemoteCharacteristic* pTime = pThermoService->getCharacteristic(thermo_time_uuid);
+  std::string next_time = pTime->readValue();
+  show("SCWRd");
+  pClient->disconnect();
+  show("SCWRD");
+  return String(next_time.c_str()).toInt();
+}
+
+void setup() {
   display.init();
   display.connect();
-  display.displayOn();
+  BLEDevice::init("");
 }
 
 void loop() {
-  delay(dht.getMinimumSamplingPeriod());
-  float humidity = dht.getHumidity();
-  float temperature = dht.getTemperature();
+  display.displayOn();
+  display.clear();
 
-  if (dht.getStatus() == DHTesp::ERROR_TIMEOUT) return;
+  BLEScan* pBLEScan = BLEDevice::getScan();
+  MyAdvertisedDeviceCallbacks* cb = new MyAdvertisedDeviceCallbacks();
+  pBLEScan->setAdvertisedDeviceCallbacks(cb);
+  pBLEScan->setActiveScan(true);
+  show("s");
+  BLEScanResults foundDevices = pBLEScan->start(30);
 
-  display.clear();
+  if (cb->pServerAddress) {
+    show("S");
 
-  String line;
-  line = "T:"; line += temperature;
-  display.drawString(0,0,line);
-  line = "H:"; line += humidity;
-  display.drawString(50,0,line);
-  display.drawString(0,10,dht.getStatusString());
+    float humidity, temperature;
+    read_sensor(&humidity,&temperature);
+    String data = String(BLEDevice::getAddress().toString().c_str()) + " " + String(humidity) + " " + String(temperature) + "\n";
+    show(data);
+    
+    int next_time = send_data_and_get_time(cb->pServerAddress,&data);
+    String nt = "Next time:";nt+=next_time;
+    display.drawString(0,20,nt);display.display();
+    delay(2000);
+    esp_sleep_enable_timer_wakeup(next_time * uS_TO_S_FACTOR);
+  }
+  else {
+    display.drawString(0,0,"s!");display.display();
+    String nt = "Next time:";nt+=DEFAULT_SLEEP_TIME;
+    display.drawString(0,20,nt);display.display();
+    delay(2000);
+    esp_sleep_enable_timer_wakeup(DEFAULT_SLEEP_TIME * uS_TO_S_FACTOR);
+  }
 
-  display.drawProgressBar(5,25,120,10,int(temperature));
-  display.drawProgressBar(5,40,120,10,int(humidity));
+  esp_deep_sleep_start();
 
-  display.display();
+  /* display.clear(); */
+
+  /* String line; */
+  /* line = "T:"; line += temperature; */
+  /* display.drawString(0,0,line); */
+  /* line = "H:"; line += humidity; */
+  /* display.drawString(50,0,line); */
+  /* display.drawString(0,10,dht.getStatusString()); */
+
+  /* display.drawProgressBar(5,25,120,10,int(temperature)); */
+  /* display.drawProgressBar(5,40,120,10,int(humidity)); */
+
+  /* display.display(); */
 }
-- 
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