mqtt script, simple data

RouterOS Scripting
1

Hi, im not familiar with scripting, i try send to mqtt modbus data.
all work fine

################################ Configuration ################################
# Name of an existing MQTT broker that should be used for publishing
:local broker "MQTT"

# MQTT topic where the message should be published
:local topic "modbuss/Temperature/DS18B20"

#################################### System ###################################


:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x1 reg-addr=0x0 as-value once]
:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x2 reg-addr=0x0 as-value once]
:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x3 reg-addr=0x0 as-value once]
:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x4 reg-addr=0x0 as-value once]
:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x5 reg-addr=0x0 as-value once]
:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x6 reg-addr=0x0 as-value once]
:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x7 reg-addr=0x0 as-value once]
:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x8 reg-addr=0x0 as-value once]
:local modbus [:put [($modbusread->"values")]]

#################################### MQTT #####################################
:local message \
"{\"TEMP\":\"$modbus\"}"
###info LOG fails
  #  :log info "$message";
    :put ("[*] Total message size: $[:len $message] bytes")
    :put ("[*] Sending message to MQTT broker...")
    /iot mqtt publish broker=$broker topic=$topic message=$message
    :put ("[*] Done")

and i get - {“TEMP”:“228”};{“TEMP”:“32768”};{“TEMP”:“32768”};{“TEMP”:“227”};{“TEMP”:“229”};{“TEMP”:“32768”};{“TEMP”:“32768”};{“TEMP”:“227”}
how i can get just a simple string like - {228, 32768, 32768, 227, …} ?
and if i understand right from script i can get only whole numbers? than i need make divide at other side not script..
Thanks.

2

If you put “TEMP:” on message how can yu have only numbers without TEMP and without “:” ?

:local message "{$[:tostr $modbus]}"

i do not have “iot” but all this:

:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x1 reg-addr=0x0 as-value once]
:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x2 reg-addr=0x0 as-value once]
:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x3 reg-addr=0x0 as-value once]
:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x4 reg-addr=0x0 as-value once]
:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x5 reg-addr=0x0 as-value once]
:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x6 reg-addr=0x0 as-value once]
:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x7 reg-addr=0x0 as-value once]
:local modbusread [/iot modbus read-holding-registers slave-id=0x08 num-regs=0x8 reg-addr=0x0 as-value once]

porobably is all useless because modbusread have the value of last “local” and all previous local are completely useless…


also what the hell you use :put???
is just this

:local modbus ($modbusread->"values")

# or all the "local" lines are simply replaced by:
:local modbus ([/iot modbus read-holding-registers slave-id=0x08 num-regs=0x8 reg-addr=0x0 as-value once]->"values")
3

Youre right, i just think read all address from device (8) but "num-regs=0x8" cover address from 1 to 8. as you say all this line was useless and maybe its reason why sometime i get "pool timeout". About TEMP i forget delete, i try get line like (TEMP1:230; TEMP2:220; TEMP3:240... etc) i dont more need this, i want just simple digit string (230, 220,230, ...) all 8 readings.
Your code " "{$[:tostr $modbus]}"[" is right what im searching for now im get "{206;32768;32768;205;205;32768;32768;205}", thanks!

KNOT - modbus routing via MQTT
4

May I ask you how did you managed to enable the port at startup?

NAME START-DATE START-TIME INTERVAL ON-EVENT RUN-COUNT

0 modbus_poll jan/19/2023 09:51:31 1s modbus2mqtt 108
1 modbus_init startup 0s modbusinit 1

/system scheduler
add interval=1s name=modbus_poll on-event=modbus2mqtt policy=
ftp,reboot,read,write,policy,test,password,sniff,sensitive,romon start-date=jan/19/2023 start-time=09:51:31
add name=modbus_init on-event=modbusinit policy=ftp,reboot,read,write,policy,test,password,sniff,sensitive,romon
start-time=startup

But it seems that "startup" is ignored and port is still disabled when start modbus_poll it got script error "Connection refused".