Update main.py

README.md

@@ -1,15 +1,28 @@
 # Han Mqtt Adapter
-Han port pinout:
+
-1. 5V
+### Install
+1. Setup picoW with MicroPython [link](https://www.raspberrypi.com/documentation/microcontrollers/micropython.html)
+2. Add dependencies (umqtt)
+3. Copy main.py and config.py to picoW root
+4. Edit config.py to correct SSID, Password and MQTT broker IP
+
+### Protocol
+[link to HAN protocol](https://hanporten.se/svenska/protokollet/)
+
+### Hardware
+Han port pinout (RJ12):
+1. 5V (max 250mA)
 2. Data request (connect to 5V to enable)
-3. GND
+3. Data GND
 4. NC
-5. DATA (TX 115200 inverted)
+5. Data (TX 115200 inverted open drain)
 6. GND
 
-Add voltage divider to Pico RX pin:
+PicoW connection:
-- 10k between pico RX pin and GND
+- Connect HAN port pin 1 and 2 to pico 5V
-- 10k between HAN pin 5 and pico RX pin
+- Connect HAN port pin 3 and 6 to pico GND
+- Connect HAN port pin 5 to pico 1 (RX)
+- Add pullup resistor (15k) between Pico RX pin and 3V3
 
 ![front](20220814_231222.MEDIUM.jpeg)
 ![back](20220814_231229.MEDIUM.jpeg)

main.py

@@ -45,23 +45,6 @@ wdt.feed()
 print("Setting up UART")
 uart = machine.UART(0, 115200,invert=UART.INV_RX)
 
-def readUntil(uartObject, termination, maxlen=-1, includeTermination=True):
-    terminatedFlag=False
-    result = ''
-    while maxlen < 0 or len(result) < maxlen:
-        if uartObject.any():
-            result += chr(uartObject.read(1)[0])
-            for terminal in termination:
-                if result.endswith(terminal):
-                    terminatedFlag=True
-                    if not includeTermination:
-                         result = result[:-len(terminal)]
-                    break
-            if(terminatedFlag==True):
-                return result
-        time.sleep_us(10)
-    return result
-
 def parse_han_protocol(data):
     data = data.replace("'b'", "")
     data_list = data.split("\\r\\n")