Unable to get xS30 extension working on the Neuron M103

phillipsnick

Running Evok release v2.0.7h
On a fairly recent version of Debian Stretch from the Raspberry Pi website.

uname -a
Linux M103-sn25 4.14.98-v7+ #1200 SMP Tue Feb 12 20:27:48 GMT 2019 armv7l GNU/Linux

Main modules inputs/outputs are working just fine within the Evok HTTP interface.

Following the setup instructions by @TomasKnot here https://forum.unipi.technology/topic/652/how-to-add-xs40-to-neuron-l203-using-custom-software/12 I now have the following:

/etc/evok.conf

[MAIN]									; !!! ALL MAIN SECTION OPTIONS ARE MANDATORY !!!
config_version = 2.5					; Configuration file version, DO NOT CHANGE!
use_schema_verification = False			; Enabling this will deny any requests that do not match the JSON Schema; NOTE THAT THIS RESULTS IN A SIGNIFICANT INCREASE IN LATENCY AND SHOULD NOT BE USED EXCEPT FOR TESTING
log_level = ERROR   					; Minimum severity of messages to be logged; one of INFO, DEBUG, WARNING, ERROR, CRITICAL
log_file = /var/log/evok.log			; Log file to use; will be cleared on boot
port = 8080								; !!! Internal API port - only change if you are certain you know what you are doing; FOR OUR WEB INTERFACE THE PORT SHOULD BE CHANGED IN "/etc/evok-nginx.conf" INSTEAD !!!
webhook_enabled = False					; Enables webhook notification - see e.g. https://sendgrid.com/blog/whats-webhook/
webhook_address = http://127.0.0.1:80   ; Put your server endpoint address here (e.g. http://123.123.123.123:/wh )
webhook_device_mask = ["input","wd"]	; List of device types to notify on (written as a JSON list) - adding AI will generate a large amount of messages!
webhook_complex_events = False			; EVOK will send POST requests with the same data as WebSocket, rather than an empty GET request
wifi_control_enabled = False			; !!! REQUIRES THE UNIPIAP WIFI CONTROLLER TO BE INSTALLED !!! Will allow evok to control the internal Neuron wifi
soap_server_enabled = False				; Enables the simple SOAP server; use only if you need the functionality
soap_server_port = 8081					; !!! IF SOAP SERVER IS ENABLED, THIS PORT NEEDS TO BE UNIQUE (i.e. different from the port setting above) !!!

[NEURON_1]
global_id = 1							; Mandatory, REQUIRED TO BE UNIQUE
allow_register_access = False 			; Optional, False default
scan_frequency = 10						; Optional, 10 default, scanning frequency in [Hz]
scan_enabled = True 					; Optional, True default

; Below you can find examples for connecting devices over UART; first example is a Neuron extension while the second is a custom third-party device
; Devices sharing a port use the port settings of the first device on that port (baud rate, parity, stop bits)
; !!! Note that device_name has to match a filename in the /etc/hw_definitions directory !!! See /etc/hw_definitions/CUSTOM MODBUS DEVICE.yaml for an example

[EXTENSION_1]
global_id = 2							; Mandatory, REQUIRED TO BE UNIQUE
device_name = xS30						; Mandatory
modbus_uart_port = /dev/extcomm/0/0 	; Mandatory
neuron_uart_circuit = 1_01				; Optional, allows associating extensions with specific Neuron UART-over-Modbus ports (not possible for non-Modbus UART ports, e.g. /dev/ttyUSB0 or /dev/ttyS0)
;allow_register_access = True 			; Optional, False default, is mandatory with third-party devices
address = 1							; Optional, 1 default
scan_frequency = 10 					; Optional, 10 default, scanning frequency in [Hz]
;scan_enabled = True 					; Optional, True default
; Note that the following settings will be inherited by other devices sharing the same port, i.e. /dev/extcomm/0/0
baud_rate = 19200						; Optional, NEEDS UNIPI IMAGE TO WORK WITH UNIPI SERIAL PORTS! USE API TO CONFIGURE UART MANUALLY IF USING STANDARD RASPBIAN
parity = N								; Optional, NEEDS UNIPI IMAGE TO WORK WITH UNIPI SERIAL PORTS! USE API TO CONFIGURE UART MANUALLY IF USING STANDARD RASPBIAN
stop_bits = 1							; Optional, NEEDS UNIPI IMAGE TO WORK WITH UNIPI SERIAL PORTS! USE API TO CONFIGURE UART MANUALLY IF USING STANDARD RASPBIAN

Wiring

RS485-A connects to RS485-A
RS485-B connects to RS485-B

Rebooted everything and the TX light on the UniPi occasionally flashes but nothing on the extension.

No additional devices available in the HTTP interface.

Tried to run the debug here:

/usr/bin/python /opt/evok/evok.py --path1=/etc/evok.conf --path2=/etc/evok-neuron.conf
/usr/bin/python: can't open file '/opt/evok/evok.py': [Errno 2] No such file or directory

Found this under /opt/evok/lib/python2.7/site-packages/evok/evok.py and adjusted the command to

/usr/bin/python /opt/evok/lib/python2.7/site-packages/evok/evok.py --path1=/etc/evok.conf
Traceback (most recent call last):
  File "/opt/evok/lib/python2.7/site-packages/evok/evok.py", line 5, in <module>
    import tornado.httpserver
ImportError: No module named tornado.httpserver

Anyone got any ideas on what I can try to debug this further? :)