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--- informatica:arduino:esp32 [2021/02/07 15:36] – created jose
+++ informatica:arduino:esp32 [2022/10/24 22:12] (current) – jose
@@ Line 1: / Line 1: @@
-ESP32
+====== Ejemplos: ======
+**Estación Metereológica:**\\
+https://github.com/NewbieMakerLearning/Servidor_Estacion_Meteo
+====== Bateria bien montada ======
+https://emariete.com/medidor-co2-con-bateria-bien-hecho/
+====== ESP32 ======
 {{:informatica:arduino:esp32_01.png|}}
+====== ARDUINO IDE ======
+Nos descargamos la última versión de Arduino IDE, tiene que ser por encima de la 1.6
+Descargamos un plugin para poder conectar con esp32:
+https://github.com/espressif/arduino-esp32
+https://github.com/espressif/arduino-esp32/blob/master/docs/arduino-ide/boards_manager.md
+Ponemos esta URL en file > preferences > Additional Boards Manager URLs:
+  https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_dev_index.json
+Tarda un ratillo en descargárselas
+Ahora vamos a tools > Board: “Arduino Uno” y seleccionamos Boards Manager. Buscamos esp32 y damos a install
+En Tools > Board: “Arduino Uno” > ESP32 Arduino
+Reiniciamos Arduino. Nos aseguramos que python apunte a python3 instalando python-is-python3
+  sudo apt install python-is-python3
+Código de ejemplo. Conecta a wifi y nos da la ip. Una vez subido tenemos que reiniciar esp32 (desconectando usb)
+<code>
+#include <WiFi.h>        // Include the Wi-Fi library
+const char* ssid     = "pitufina";         // The SSID (name) of the Wi-Fi network you want to connect to
+const char* password = "********";     // The password of the Wi-Fi network
+void setup() {
+  Serial.begin(115200);         // Start the Serial communication to send messages to the computer
+  delay(10);
+  Serial.println('\n');
+  WiFi.begin(ssid, password);             // Connect to the network
+  Serial.print("Connecting to ");
+  Serial.print(ssid);
+  while (WiFi.status() != WL_CONNECTED) { // Wait for the Wi-Fi to connect
+    delay(500);
+    Serial.print('.');
+  }
+  Serial.println('\n');
+  Serial.println("Connection established!");
+  Serial.print("IP address:\t");
+  Serial.println(WiFi.localIP());         // Send the IP address of the ESP8266 to the computer
+}
+void loop() {
+}
+</code>
+La salida que nos da es esta:
+<code>
+.
+Connection established!
+IP address:	192.168.1.97
+</code>
+HAcer petición GET y POST
+<code>
+#include <WiFi.h>        // Include the Wi-Fi library
+#include <HTTPClient.h>
+const char* ssid     = "mi_red";         // The SSID (name) of the Wi-Fi network you want to connect to
+const char* password = "*********";     // The password of the Wi-Fi network
+//Your Domain name with URL path or IP address with path
+String serverName = "http://192.168.1.200/esp32";
+// the following variables are unsigned longs because the time, measured in
+// milliseconds, will quickly become a bigger number than can be stored in an int.
+unsigned long lastTime = 0;
+// Timer set to 10 minutes (600000)
+//unsigned long timerDelay = 600000;
+// Set timer to 5 seconds (5000)
+unsigned long timerDelay = 5000;
+void setup() {
+  Serial.begin(115200);
+  WiFi.begin(ssid, password);
+  Serial.println("Connecting");
+  while(WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+  Serial.println("");
+  Serial.print("Connected to WiFi network with IP Address: ");
+  Serial.println(WiFi.localIP());
+  Serial.println("Timer set to 5 seconds (timerDelay variable), it will take 5 seconds before publishing the first reading.");
+}
+void loop() {
+  //Send an HTTP POST request every 10 minutes
+  if ((millis() - lastTime) > timerDelay) {
+    //Check WiFi connection status
+    if(WiFi.status()== WL_CONNECTED){
+      HTTPClient http;
+      String serverPath = serverName + "?temperature=24.37";
+      // Your Domain name with URL path or IP address with path
+      http.begin(serverPath.c_str());
+      // Send HTTP GET request
+      int httpResponseCode = http.GET();
+      if (httpResponseCode>0) {
+        Serial.print("HTTP Response code: ");
+        Serial.println(httpResponseCode);
+        String payload = http.getString();
+        Serial.println(payload);
+      }
+      else {
+        Serial.print("Error code: ");
+        Serial.println(httpResponseCode);
+      }
+      // Free resources
+      http.end();
+    }
+    else {
+      Serial.println("WiFi Disconnected");
+    }
+    lastTime = millis();
+  }
+}
+</code>
+====== Python ======
+https://www.youtube.com/watch?v=fs10aqFTj8I
+  apt-get install esptool
+Descargamos el firmware:
+https://micropython.org/download/esp32/
+Descargo este:
+   GENERIC : esp32-idf3-20210202-v1.14.bin
+Para borrar la memoria. Si no sabemos el puerto, no lo ponemos y lo detecta, es /dev/ttyUSB0:
+  esptool erase_flash
+<code>
+esptool.py v2.8
+Found 1 serial ports
+Serial port /dev/ttyUSB0
+Connecting........_
+Detecting chip type... ESP32
+Chip is ESP32D0WDQ6 (revision 1)
+Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
+Crystal is 40MHz
+MAC: f0:08:d1:d3:1e:98
+Enabling default SPI flash mode...
+Erasing flash (this may take a while)...
+A fatal error occurred: ESP32 ROM does not support function erase_flash.
+</code>
+Da error. Subimos el firmware que hemos descargado. Tarda un poco. Debería devolver un prompt pero no hace nada:
+  esptool write_flash 0x1000 esp32-idf3-20210202-v1.14.bin
+<code>
+esptool.py v2.8
+Found 1 serial ports
+Serial port /dev/ttyUSB0
+Connecting.......
+Detecting chip type... ESP32
+Chip is ESP32D0WDQ6 (revision 1)
+Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
+Crystal is 40MHz
+MAC: f0:08:d1:d3:1e:98
+Enabling default SPI flash mode...
+Configuring flash size...
+Auto-detected Flash size: 4MB
+Erasing flash...
+Took 2.39s to erase flash block
+Wrote 1445888 bytes at 0x00001000 in 140.5 seconds (82.3 kbit/s)...
+Hash of data verified.
+Leaving...
+Hard resetting via RTS pin...
+</code>
+====== Arduino IDE ======
+https://github.com/espressif/arduino-esp32
+https://github.com/espressif/arduino-esp32/blob/master/docs/arduino-ide/boards_manager.md
+Ponemos esta URL en file > preferences > Additional Boards Manager URLs:
+  https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_dev_index.json
+Ahora vamos a tools > Board: "Arduino Uno" y seleccionamos Boards Manager. Buscamos esp32 y damos a install
+En Tools > Board: "Arduino Uno" > ESP32 Arduino
+====== Energia y consumo ======
+https://lastminuteengineers.com/esp32-sleep-modes-power-consumption/
+====== Pantalla e-paper ======
+https://www.youtube.com/watch?v=1xQqc6ZCXdw