Mostra la font per a ModBUS RTU a l'IoT-Vertebrae

El ModBUS RTU a l'IoT-Vertebrae és integrat al [[Cap (Head v2.0) - IoT-Vertebrae| cap v2.1]]. '''Hi ha dos accessos possibles, un des de el microcontrolador ESP32S3 i l'altre des de la Raspberry Pi'''. A versions prèvies de cap cal fer servir un convertidor USB a ModBUS RTU connectat directament a la Raspberry Pi.

Codi per accedir al ModBUS RTU [https://github.com/jordibinefa/IoT-02/blob/master/codes/python/modbus/mb_IoT_01.py mb_IoT_01.py] per a la Raspberry Pi (dependencies amb [https://github.com/jordibinefa/IoT-02/blob/master/codes/python/modbus/crc16c.py crc16c.py] i [https://github.com/jordibinefa/IoT-02/blob/master/codes/python/modbus/kbhit.py kbhit.py]).

El dispositiu ModBUS RTU, per a interaccionar amb el cap ('''/dev/serial0''') o Raspberry Pi ('''/dev/ttyUSB0'''), que s'ha fet servir és una [[Placa IoT-02 | placa IoT-02]] amb el codi per a l'IDE d'Arduino [https://github.com/jordibinefa/IoT-02/tree/master/codes/IoT-02_11_modbus_bme280 IoT-02_11_modbus_bme280].

= ModBUS RTU integrat al cap =
[[Image:Head_v2.0.png|center|thumb|HEAD v2.0]]

 pi@raspberrypi:~/codis/modbus $ '''python mb_IoT_01.py /dev/serial0 4800'''
 '''s''': Relay SET, '''r''': Relay RESET, i: Read inputs, '''t''': temperature, '''h''': relative humidity, p: pressure, a: 
 altitude, v: VOC and q: quit
 Baudrate: 4800 at /dev/serial0
 {
 Sending: Relay SET
 07050004FF00CD9D
 He rebut 8 bytes
 07050004FF00CDFF
 Received: '''Relay SET'''
 } ----
 {
 Sending: Relay RESET
 0705000400008C6D
 He rebut 8 bytes
 0705000400008CFF
 Received: '''Relay RESET'''
 } ----
 {
 Sending: Reading temperature
 070300000001846C
 He rebut 7 bytes
 0703020AB37751
 '''T: 27.39 ºC'''
 } ----
 {
 Sending: Reading relative humidity
 070300010001D5AC
 He rebut 7 bytes
 07030214F03F00 
 '''RH: 53.60 %'''
 } ----

= ModBUS RTU emprant un convertidor USB a RS485 =
[[Image:usbModbusRtu00.jpg|center|thumb|Convertidor USB a ModBUS RTU]]

 pi@raspberrypi:~/codis/modbus $ '''python mb_IoT_01.py /dev/ttyUSB0 4800'''
 s: Relay SET, r: Relay RESET, i: Read inputs, '''t''': temperature, '''h''': relative humidity, p: pressure, a: altitude, v: VOC and q: quit
 Baudrate: 4800 at /dev/serial0
 {
 Sending: Reading temperature
 070300000001846C
 He rebut 7 bytes
 0703020AF83766
 '''T: 28.08 ºC'''
 } ----
 {
 Sending: Reading relative humidity
 070300010001D5AC
 He rebut 7 bytes
 0703021211FCE8
 '''RH: 46.25 %'''
 } ----