Configuration via serial using json

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "lib/Adafruit_NeoPixel"]
 	path = lib/Adafruit_NeoPixel
 	url = https://github.com/adafruit/Adafruit_NeoPixel.git
+[submodule "lib/ArduinoJson"]
+	path = lib/ArduinoJson
+	url = https://github.com/bblanchon/ArduinoJson.git

README.md

@@ -0,0 +1,14 @@
+# Bedside table
+An esp8266 powered **IKEA Tvärfot** with a Neopixel ring and a proximity sensor.
+
+![](https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fwww.ikea.com%2Fbe%2Ffr%2Fimages%2Fproducts%2Ftvaerfot-table-lamp-black-white__0772756_PE756088_S5.JPG%3Ff%3Dxxs&f=1&nofb=1)
+
+## Writing a configuration
+Open a Serial Monitor at baudrate 9600 and paste the following json configuration adapted to your needs.
+```
+{
+   "hostname": "your_hostname",
+   "ssid": "your_ssid",
+   "pass": "[48..."
+}
+```

include/config.h

@@ -1,3 +1,5 @@
+#pragma once
+
 #include <Arduino.h>
 
 class Config {

lib/ArduinoJson

@@ -0,0 +1 @@
+Subproject commit 6fb52c363849557c69485f97110371d0a4454432

src/config.cpp

@@ -4,6 +4,18 @@
 
 namespace {
 const int addr = 0;
+
+void printConfig(Config::Data data)
+{
+    Serial.printf("hostname: %s\n", data.hostname);
+    Serial.printf("ssid: %s\n", data.ssid);
+    Serial.printf("pass: %s\n", data.pass);
+    Serial.printf("brightness: %d\n", data.brightness);
+    Serial.printf("color: %d, %d, %d\n",
+                  data.color.at(0),
+                  data.color.at(1),
+                  data.color.at(2));
+}
 } // namespace
 
 Config& Config::Instance()
@@ -17,6 +29,8 @@ void Config::load()
     EEPROM.begin(sizeof(data));
     EEPROM.get(addr, data);
     EEPROM.end();
+    Serial.println("Loading config");
+    printConfig(data);
 }
 
 void Config::write()
@@ -25,6 +39,9 @@ void Config::write()
     EEPROM.put(addr, data);
     EEPROM.commit();
     EEPROM.end();
+
+    Serial.println("Saving config");
+    printConfig(data);
 }
 void Config::write(Data data)
 {

src/main.cpp

@@ -1,4 +1,5 @@
 #include <Arduino.h>
+#include <ArduinoJson.h>
 
 // My own includes
 #include "config.h"
@@ -11,7 +12,7 @@ const int sensorPin = A0;
 const int ledPin = D8;
 const int ledCount = 4;
 
-Config &config = Config::Instance();
+Config& config = Config::Instance();
 
 MyLed myLed(ledPin, ledCount);
 
@@ -26,6 +27,8 @@ void setup()
     Serial.begin(9600);
 
     myLed.initialize();
+
+    config.load();
 }
 
 float filter(float input)
@@ -62,6 +65,35 @@ SensorData getDist()
             .validReading = validReading};
 }
 
+void checkSerial()
+{
+    String s = Serial.readString();
+    if (!s.isEmpty())
+    {
+        Serial.println(s.c_str());
+        DynamicJsonDocument doc(200);
+        deserializeJson(doc, s);
+        JsonObject obj = doc.as<JsonObject>();
+        String hostname = obj["hostname"];
+        String ssid = obj["ssid"];
+        String pass = obj["pass"];
+        Serial.printf("Parsed hostname: %s, ssid: %s, pass: %s\n",
+                      hostname.c_str(),
+                      ssid.c_str(),
+                      String(pass).c_str());
+
+        if (hostname != "null" && ssid != "null" && pass != "null")
+        {
+            hostname.toCharArray(config.data.hostname,
+                                 sizeof(config.data.hostname));
+            ssid.toCharArray(config.data.ssid, sizeof(config.data.ssid));
+            pass.toCharArray(config.data.pass, sizeof(config.data.pass));
+
+            config.write();
+        }
+    }
+}
+
 void evalDist(SensorData data)
 {
     /************************************************
@@ -140,8 +172,7 @@ void loop()
 
     myLed.run();
 
-    // if (data.validReading)
-    //  Serial.printf("Value: %f\n", data.distance);
+    // checkSerial();
 
     delay(50);
 }