Add potiNano Code

terminal/puzzle_colorFade/potiNano/.gitignore

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+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

terminal/puzzle_colorFade/potiNano/platformio.ini

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+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:nanoatmega328new]
+platform = atmelavr
+board = nanoatmega328new
+framework = arduino

terminal/puzzle_colorFade/potiNano/src/main.cpp

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+#include <Arduino.h>
+
+#include <Wire.h>
+
+#define I2C_SLAVE_ADDRESS 0x08
+
+uint16_t values[6] = {0};
+
+void onI2CRequest() {
+    Wire.write((uint8_t*)values, sizeof(values));
+}
+
+void setup() {
+    Wire.begin(I2C_SLAVE_ADDRESS);
+    Wire.onRequest(onI2CRequest);
+
+    analogReference(DEFAULT);
+}
+
+void loop() {
+    values[0] = analogRead(A0);
+    values[1] = analogRead(A1);
+    values[2] = analogRead(A2);
+
+    values[3] = analogRead(A3);
+    values[4] = analogRead(A6);
+    values[5] = analogRead(A7);
+}