separate display control from knobs

display/.gitignore

@@ -0,0 +1 @@
+config.h

display/display.ino

@@ -0,0 +1,125 @@
+#include <U8g2lib.h>
+#include <ArduinoMqttClient.h>
+#include <ESP8266WiFi.h>
+#include "config.h"
+
+WiFiClient client;
+MqttClient mqttClient(client);
+
+//U8G2_SSD1306_128X64_NONAME_F_HW_I2C headingDisplay(U8G2_R0, /* clock=*/ SCL, /* data=*/ SDA, /* reset=*/ U8X8_PIN_NONE);  // High speed I2C
+//U8G2_SSD1306_128X64_NONAME_F_HW_I2C speedDisplay(U8G2_R0, /* clock=*/ SCL, /* data=*/ SDA, /* reset=*/ U8X8_PIN_NONE);
+
+U8G2_SSD1306_128X64_NONAME_F_HW_I2C headingDisplay(U8G2_R0);  // High speed I2C
+U8G2_SSD1306_128X64_NONAME_F_HW_I2C speedDisplay(U8G2_R0);
+
+
+const char broker[] = "mqtt.sugarland.lan";
+int        port     = 1883;
+const char topic[]  = "/xplane/rref/#";
+
+void onMqttMessage(int messageSize) {
+  if (mqttClient.messageTopic() == "/xplane/rref/1") {
+    char buf[3] = "";
+    char c = '\0';
+    for (int i = 0; i < 3 && mqttClient.available() && c != '.'; i++) {
+      c = (char)mqttClient.read();
+      if (c != '.') {
+        buf[i] = c;
+      }
+    }
+
+    if (buf[1] == '\0') {
+      buf[1] = buf[0];
+      buf[0] = '0';
+    }
+  
+    if (buf[2] == '\0') {
+      buf[2] = buf[1];
+      buf[1] = buf[0];
+      buf[0] = '0';
+    }
+  
+    headingDisplay.clearBuffer();
+    headingDisplay.setFont(u8g2_font_fub11_tf);
+    headingDisplay.drawStr(0, 11, "HDG");
+    headingDisplay.setFont(u8g2_font_fub42_tn);
+    headingDisplay.drawStr(10, 63, buf);
+    headingDisplay.sendBuffer();
+  } else if (mqttClient.messageTopic() == "/xplane/rref/2") {
+    char buf[3] = "";
+    char c = '\0';
+    for (int i = 0; i < 3 && mqttClient.available() && c != '.'; i++) {
+      c = (char)mqttClient.read();
+      if (c != '.') {
+        buf[i] = c;
+      }
+    }
+
+    if (buf[1] == '\0') {
+      buf[1] = buf[0];
+      buf[0] = '0';
+    }
+  
+    if (buf[2] == '\0') {
+      buf[2] = buf[1];
+      buf[1] = buf[0];
+      buf[0] = '0';
+    }
+  
+    speedDisplay.clearBuffer();
+    speedDisplay.setFont(u8g2_font_fub11_tf);
+    speedDisplay.drawStr(0, 11, "SPD");
+    speedDisplay.setFont(u8g2_font_fub42_tn);
+    speedDisplay.drawStr(10, 63, buf);
+    speedDisplay.sendBuffer();
+    
+  }
+}
+
+void setup() {
+  // put your setup code here, to run once:
+  Serial.begin(9600);
+  while (!Serial) {
+    ; // wait for serial port to connect. Needed for native USB port only
+  }
+
+  WiFi.begin(WLAN_SSID, WLAN_PASS);
+
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+  Serial.println("");
+  Serial.println("WiFi connected");
+  Serial.println(WiFi.localIP());
+
+  mqttClient.setUsernamePassword(MQTT_USER3, MQTT_PASS);
+  if (!mqttClient.connect(broker, port)) {
+    Serial.print("MQTT connection failed! Error code = ");
+    Serial.println(mqttClient.connectError());
+
+    while (1);
+  } else {
+    Serial.println("MQTT connected");
+  }
+
+  headingDisplay.begin();
+  speedDisplay.setI2CAddress(0x7A);
+  speedDisplay.begin();
+
+  mqttClient.onMessage(onMqttMessage);
+  mqttClient.subscribe(topic);
+
+  mqttClient.beginMessage("/xplane/meta/rref");
+  mqttClient.print("001 200 sim/cockpit/autopilot/heading_mag");
+  mqttClient.endMessage();
+  mqttClient.beginMessage("/xplane/meta/rref");
+  mqttClient.print("002 200 sim/cockpit/autopilot/airspeed");
+  mqttClient.endMessage();
+}
+
+void loop() {
+  // call poll() regularly to allow the library to receive MQTT messages and
+  // send MQTT keep alives which avoids being disconnected by the broker
+  mqttClient.poll();
+}

test/test.ino

@@ -1,5 +1,3 @@
-#include <U8g2lib.h>
-
 #include <MCP23017.h>
 #include <ArduinoMqttClient.h>
 #include <Ethernet.h>
@@ -30,7 +28,6 @@ MqttClient mqttClient(client);
 byte lastRotInput_1A;
 
 MCP23017 mcp1 = MCP23017(ROT_ADDR_1, 100);
-U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* clock=*/ SCL, /* data=*/ SDA, /* reset=*/ U8X8_PIN_NONE);  // High speed I2C
 
 void setup() {
   // put your setup code here, to run once:
@@ -49,7 +46,7 @@ void setup() {
   // print your local IP address:
   Serial.println(Ethernet.localIP());
 
-  mqttClient.setUsernamePassword(MQTT_USER, MQTT_PASS);
+  mqttClient.setUsernamePassword(MQTT_USER2, MQTT_PASS);
 
   if (!mqttClient.connect(broker, port)) {
     Serial.print("MQTT connection failed! Error code = ");
@@ -75,15 +72,6 @@ void setup() {
   mcp1.setPortPullUp(0b00000000, ROT_PORT_A);
 
   lastRotInput_1A = mcp1.getPort(ROT_PORT_A);
-
-  u8g2.begin();
-
-  mqttClient.beginMessage("/xplane/meta/rref");
-  mqttClient.print("001 010 sim/cockpit/autopilot/heading_mag");
-  mqttClient.endMessage();
-  mqttClient.beginMessage("/xplane/meta/rref");
-  mqttClient.print("002 010 sim/cockpit/autopilot/airspeed");
-  mqttClient.endMessage();
 }
 
 bool isBitDown(byte input, byte reference) {
@@ -149,37 +137,6 @@ void loop() {
 }
 
 void onMqttMessage(int messageSize) {
-  if (mqttClient.messageTopic() == "/xplane/rref/1") {
-    char buf[3] = "";
-    char c = '\0';
-    for (int i = 0; i < 3 && mqttClient.available() && c != '.'; i++) {
-      c = (char)mqttClient.read();
-      if (c != '.') {
-        buf[i] = c;
-      }
-    }
-
-    if (buf[1] == '\0') {
-      buf[1] = buf[0];
-      buf[0] = '0';
-    }
-  
-    if (buf[2] == '\0') {
-      buf[2] = buf[1];
-      buf[1] = buf[0];
-      buf[0] = '0';
-    }
-  
-    u8g2.clearBuffer();
-    u8g2.setFont(u8g2_font_fub11_tf);
-    u8g2.drawStr(0, 11, "HDG");
-    u8g2.setFont(u8g2_font_fub42_tn);
-    u8g2.drawStr(10, 63, buf);
-    u8g2.sendBuffer();
-  }
-
-  // TODO: speed display
-
 //  // we received a message, print out the topic and contents
 //  Serial.println("Received a message with topic '");
 //  Serial.print(mqttClient.messageTopic());