diff --git a/main.ipynb b/main.ipynb
new file mode 100644
index 0000000..8c687d4
--- /dev/null
+++ b/main.ipynb
@@ -0,0 +1,131 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "id": "42e3a72f",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "T1 = 27.73 °C\n"
+     ]
+    }
+   ],
+   "source": [
+    "import serial\n",
+    "import time\n",
+    "\n",
+    "ser = serial.Serial('/dev/cu.usbmodem101', 115200, timeout=1)  # Adjust port\n",
+    "time.sleep(2)  # Wait for Arduino reset\n",
+    "\n",
+    "# Example: read temperatures\n",
+    "ser.write(b'T1\\n')\n",
+    "t1 = ser.readline().decode().strip()\n",
+    "time.sleep(1)  # Wait for Arduino reset\n",
+    "print('T1 =', t1, '°C')\n",
+    "ser.close()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "id": "4fe435c4",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import numpy as np\n",
+    "Temps = np.ones(10)*40\n",
+    "Reads = np.zeros(10)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "id": "4be8126a",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "T1 = 26.86 °C\n",
+      "T1 = 26.82 °C\n",
+      "T1 = 26.89 °C\n",
+      "T1 = 26.79 °C\n",
+      "T1 = 26.82 °C\n",
+      "T1 = 26.79 °C\n",
+      "T1 = 26.89 °C\n",
+      "T1 = 26.79 °C\n",
+      "T1 = 26.89 °C\n",
+      "T1 = 26.82 °C\n"
+     ]
+    }
+   ],
+   "source": [
+    "import serial\n",
+    "import time\n",
+    "\n",
+    "ser = serial.Serial('/dev/cu.usbmodem101', 115200, timeout=1)  # Adjust port\n",
+    "time.sleep(2)  # Wait for Arduino reset\n",
+    "\n",
+    "for i in range(len(Temps)):\n",
+    "    value = Temps[i]\n",
+    "    command = f\"Q1 {value}\\n\"\n",
+    "    ser.write(command.encode('ascii'))\n",
+    "    ser.write(b'T1\\n')\n",
+    "    t1 = ser.readline().decode().strip()\n",
+    "    Reads[i] = t1\n",
+    "    print('T1 =', t1, '°C')\n",
+    "    time.sleep(1)  # Wait for Arduino reset\n",
+    "\n",
+    "ser.close()\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 17,
+   "id": "db140260",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "array([26.86, 26.82, 26.89, 26.79, 26.82, 26.79, 26.89, 26.79, 26.89,\n",
+       "       26.82])"
+      ]
+     },
+     "execution_count": 17,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "Reads"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": ".venv (3.13.5)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.13.5"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/my-tclab-firmware/my-tclab-firmware.ino b/my-tclab-firmware/my-tclab-firmware.ino
index 7db2f29..4f0d20f 100644
--- a/my-tclab-firmware/my-tclab-firmware.ino
+++ b/my-tclab-firmware/my-tclab-firmware.ino
@@ -9,8 +9,6 @@ const int Q2 = 5; // PWM at Q2 (output)
 
 
 // vars and constants:
-int T1Val;
-int T2Val;
 const int nAvg = 10; // samples per reading
 const long BAUD = 115200; // Freq serial comm
 const float factor = 3.3/1024*100; // 3.3V/1024*100
@@ -38,21 +36,42 @@ void setHeater(int pin, float value) {
 
 void setup() {
   // put your setup code here, to run once:
+  Serial.begin(BAUD);
   pinMode(Q1, OUTPUT);
   pinMode(Q2, OUTPUT);
   pinMode(LED, OUTPUT);
-  setHeater(Q1,40);
   analogReference(EXTERNAL);
-  Serial.begin(BAUD);
   delay(100);
-  Serial.println("Temps");
+  //Serial.println("TCLab ready");
 }
 
 void loop() {
   // put your main code here, to run repeatedly:
-  float t1Val = readDeg(T1);
-  float t2Val = readDeg(T2);
-  Serial.print(t1Val,4); Serial.print(',');
-  Serial.println(t2Val,4);
-  delay(250);
+  if(Serial.available()){
+    String cmd = Serial.readStringUntil('\n');
+    cmd.trim();
+
+    if(cmd == "T1"){
+      float T1Val = readDeg(T1);
+      Serial.println(T1Val);
+    }
+    else if(cmd == "T2"){
+      float T2Val = readDeg(T2);
+      Serial.println(T2Val);
+    }
+    else if(cmd.startsWith("Q1 ")){
+      int val = cmd.substring(3).toInt();
+      setHeater(Q1, val);
+    }
+    else if(cmd.startsWith("Q2 ")){
+      int val = cmd.substring(3).toInt();
+      setHeater(Q2, val);
+    } 
+    else if(cmd == "R1"){
+      Serial.println("Not yet");
+    }
+    else {
+      Serial.println("Command Error");
+    }
+  }
 }