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--- pm:prj2021:abasoc:smarthome [2021/04/25 23:57]
tudor.niculescu0610
+++ pm:prj2021:abasoc:smarthome [2021/06/03 11:58] (current)
tudor.niculescu0610
@@ Line 1: / Line 1: @@
-======  Connect4======
+======SmartHome cu Arduino prin RS485======
 Autor: [[tudor.h.niculescu@gmail.com | Tudor Horia Niculescu]]
@@ Line 5: / Line 5: @@
 ====== Introducere ======
-Instalarea a senzori de lumina, praf, temperatura, calitatea aerului in casa printr-un bus RS485, folosind un PC ca master, si arduino + senzori ca slave
+Scopul proiectului este sa folosesc un arduino pentru a interfata cateva tipuri diferite de senzori cu RS485 - Modbus, pentru a putea fi folositi intr-un proiect de tipul SmartHome.
-====== Descriere generală ======
+====== Schema Bloc ======
-TODO
+{{ :pm:prj2021:abasoc:thniculescu_smarthome.jpg?600 |}}
 ====== Hardware Design ======
-TODO
+Lista de piese:
+  * Arduino UNO
+  * Breadboard
+  * Senzor optic CNY70
+  * UART TTL to RS485 converter
+  * USB to serial RS485
+{{ :pm:prj2021:abasoc:smarthomers485-schema-electrica.png?600 |}}
 ====== Software Design ======
-TODO
+Proiectul e format din 2 parti:
+  * slave - Arduino
+  * master - Python
+Codul de slave citeste regulat senzorul si raspunde la requesturi(citiri) modbus. Foloseste biblioteca ArduinoModbus.
+Codul de master ruleaza pe calculator, si citeste date de la sclavii conectati la busul RS485. Foloseste biblioteca de python minimalmodbus.
 ====== Rezultate Obținute ======
-TODO
+Am reusit sa citesc senzorul pe arduino si sa afisez la seriala.
+Calculatorul si Arduinoul comunica prin RS485-Modbus dar checksumul raspunsurilor de la Arduino este prost. Nu am reusit sa fac debugging intrucat folosesc seriala pentru comunicare prin RS485.
-====== Concluzii ======
+Eroare checksum:
-TODO
+  Traceback (most recent call last):
+    File "./master-rs485.py", line 13, in <module>
+      val = instrument.read_register(0, 0, 3)
+    File "/usr/local/lib/python2.7/dist-packages/minimalmodbus.py", line 258, in read_register
+      return self._genericCommand(functioncode, registeraddress, numberOfDecimals=numberOfDecimals, signed=signed)
+    File "/usr/local/lib/python2.7/dist-packages/minimalmodbus.py", line 697, in _genericCommand
+      payloadFromSlave = self._performCommand(functioncode, payloadToSlave)
+    File "/usr/local/lib/python2.7/dist-packages/minimalmodbus.py", line 798, in _performCommand
+      payloadFromSlave = _extractPayload(response, self.address, self.mode, functioncode)
+    File "/usr/local/lib/python2.7/dist-packages/minimalmodbus.py", line 1075, in _extractPayload
+      raise ValueError(text)
+  ValueError: Checksum error in rtu mode: '\x01\x83' instead of '\x00\x00' . The response is: '\x01\x83\x02\xc0\xf1\x01\x83' (plain response:
+  '\x01\x83\x02\xc0\xf1\x01\x83')
-====== Download ======
+{{:pm:prj2021:abasoc:smarthomers485-poza.jpeg?400}}
-TODO
-====== Jurnal ======
+https://youtu.be/BwLi745r3rU
-TODO
+====== Download ======
+{{:pm:prj2021:abasoc:smarthomers485.zip | Source code }}
 ====== Bibliografie/Resurse ======
-[[https://ocw.cs.pub.ro/courses/pm/prj2021/abasoc/smarthome?do=export_pdf | PDF]]
+[[https://ocw.cs.pub.ro/courses/pm/prj2021/abasoc/smarthome?do=export_pdf | PDF]] \\
+https://www.arduino.cc/en/ArduinoModbus/ArduinoModbus \\
+https://minimalmodbus.readthedocs.io/en/stable/apiminimalmodbus.html \\