commit f5c28f3c641e1ff9ca17b0cd13a2974dfe00897d
Author: Petr Kracík <petrkr@petrkr.net>
Date:   Tue Jun 11 23:38:48 2019 +0200

    Initial commit

diff --git a/ZPA_elektromer_UARTtest.ino b/ZPA_elektromer_UARTtest.ino
new file mode 100644
index 0000000..b890fca
--- /dev/null
+++ b/ZPA_elektromer_UARTtest.ino
@@ -0,0 +1,101 @@
+#include <WiFi.h>
+#include <WiFiClient.h>
+#include <ArduinoOTA.h>
+
+const char* host = "zpaesp32";
+const char* ssid = "...";
+const char* password = "...";
+
+void setup() {
+  // put your setup code here, to run once:
+  Serial.begin(115200);
+  WiFi.mode(WIFI_STA);
+
+  WiFi.begin(ssid, password);
+  while (WiFi.waitForConnectResult() != WL_CONNECTED) {
+    Serial.println("Connection Failed! Rebooting...");
+    delay(5000);
+    ESP.restart();
+  }
+
+  ArduinoOTA
+  .onStart([]() {
+    String type;
+    if (ArduinoOTA.getCommand() == U_FLASH)
+      type = "sketch";
+    else // U_SPIFFS
+      type = "filesystem";
+
+    // NOTE: if updating SPIFFS this would be the place to unmount SPIFFS using SPIFFS.end()
+    Serial.println("Start updating " + type);
+  })
+  .onEnd([]() {
+    Serial.println("\nEnd");
+  })
+  .onProgress([](unsigned int progress, unsigned int total) {
+    Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
+  })
+  .onError([](ota_error_t error) {
+    Serial.printf("Error[%u]: ", error);
+    if (error == OTA_AUTH_ERROR) Serial.println("Auth Failed");
+    else if (error == OTA_BEGIN_ERROR) Serial.println("Begin Failed");
+    else if (error == OTA_CONNECT_ERROR) Serial.println("Connect Failed");
+    else if (error == OTA_RECEIVE_ERROR) Serial.println("Receive Failed");
+    else if (error == OTA_END_ERROR) Serial.println("End Failed");
+  });
+
+  ArduinoOTA.begin();
+
+  Serial2.begin(300, SERIAL_7E1, 36, 4);
+
+  Serial.println("Test ZPA elektro");
+
+
+  Serial.println("Ready");
+  Serial.print("IP address: ");
+  Serial.println(WiFi.localIP());
+
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  ArduinoOTA.handle();
+
+
+  if (Serial2.available()) {
+    char r = Serial2.read();
+
+    if (r == 0x02) {
+      Serial.print("<STX>");
+      return;
+    }
+
+    if (r == 0x03) {
+      Serial.print("<ETX>");
+      return;
+    }
+
+    Serial.write(r);
+  }
+
+
+  if (Serial.available()) {
+    char r = Serial.read();
+
+    if (r == 'R') {
+      Serial.println("Requesting data");
+      Serial2.print("/?!\r\n");
+      return;
+    }
+
+    if (r == 'C') {
+      Serial.println("Trying change baudrate");
+      Serial2.write(0x06);
+      Serial2.print("030\r\n");
+      return;
+    }
+
+    Serial2.write(r);
+  }
+
+}