Serial connection btw EmonTx and rpi 4

Obiefuna_Obidike · 2022-06-01T00:14:06.327Z

Hello guys please i have been trying to figure out why i can not view my readings on the emoncms feed or input view.
i have connected the emontx to a rpi 4b as shown in the picture. since i did not have a female to female connector i made use of breadboard.

WhatsApp Image 2022-06-01 at 1.07.53 AM477×1008 65.2 KB

however, i still can not get a reading on the input view or feed view n emoncms.

Screenshot (13)1920×1080 193 KB

please how can i configure this to get it sorted out?
thanks

borpin · 2022-06-01T06:07:10.086Z

A long thread, I know, but tells you everything! EmonTX to Rpi - Direct Serial Connection

First step is to use miniterm to check what is being received on the serial input (if anything).

$ miniterm /dev/ttyAMA0 115200

Remember to stop emonhub first.

[edit]
Did you make changes to emonhub for the serial connection?

Can you post the config and the log?

Robert.Wall · 2022-06-01T09:07:30.763Z

You haven’t fallen for the very big problem that continues to confuse everyone?

Tx and Rx are swapped on the emonTx pcb, so as I’ve written so many times here, the emonTx is sending data on the pin labelled “Rx”, and it’s looking for data coming in on the pin labelled “Tx”. That’s contrary to convention (unless the emonTx is a modem!) This applies to all except the EmonTx V3.2 and the Heatpump board.

If you’ve followed the instructions for connecting the emonTx to the RPi carefully and accurately, you should be OK. If you thought they were wrong - it’s you who is wrong .

Obiefuna_Obidike · 2022-06-01T09:41:38.344Z

Thanks for the response.

i am having a read at the post. Aslo i do not know where or when to use the miniterm

no i did not make any changes to emonhub for the serial connection , did not know i had to do that.

this is the log

Screenshot (15)1920×1080 258 KB

Screenshot (16)1920×1080 261 KB

and this is the config file

#######################################################################
#######################      emonhub.conf     #########################
#######################################################################
### emonHub configuration file, for info see documentation:
### https://github.com/openenergymonitor/emonhub/blob/emon-pi/configuration.md
#######################################################################
#######################    emonHub  settings    #######################
#######################################################################

[hub]
### loglevel must be one of DEBUG, INFO, WARNING, ERROR, and CRITICAL
loglevel = DEBUG
### Uncomment this to also send to syslog
# use_syslog = yes
#######################################################################
#######################       Interfacers       #######################
#######################################################################

[interfacers]
### This interfacer manages the RFM12Pi/RFM69Pi/emonPi module
[[RFM2Pi]]
    Type = EmonHubJeeInterfacer
    [[[init_settings]]]
        com_port = /dev/ttyAMA0
        com_baud = 38400                        # 9600 for old RFM12Pi
    [[[runtimesettings]]]
        pubchannels = ToEmonCMS,
        subchannels = ToRFM12,

        group = 210
        frequency = 433
        baseid = 5                              # emonPi / emonBase nodeID
        calibration = 230V                      # (UK/EU: 230V, US: 110V)
        quiet = true                            # Disable quite mode (default enabled) to enable RF packet debugging, show packets which fail crc
        # interval =  300                         # Interval to transmit time to emonGLCD (seconds)


[[MQTT]]

    Type = EmonHubMqttInterfacer
    [[[init_settings]]]
        mqtt_host = 127.0.0.1
        mqtt_port = 1883
        mqtt_user = emonpi
        mqtt_passwd = emonpimqtt2016

    [[[runtimesettings]]]
        pubchannels = ToRFM12,
        subchannels = ToEmonCMS,

        # emonhub/rx/10/values format
        # Use with emoncms Nodes module
        node_format_enable = 1
        node_format_basetopic = emonhub/

        # emon/emontx/power1 format - use with Emoncms MQTT input
        # http://github.com/emoncms/emoncms/blob/master/docs/RaspberryPi/MQTT.md
        nodevar_format_enable = 1
        nodevar_format_basetopic = emon/

        # Single JSON payload published  - use with Emoncms MQTT
        node_JSON_enable = 0
        node_JSON_basetopic = emon/

[[emoncmsorg]]
    Type = EmonHubEmoncmsHTTPInterfacer
    [[[init_settings]]]
    [[[runtimesettings]]]
        pubchannels = ToRFM12,
        subchannels = ToEmonCMS,
        url = https://emoncms.org
        apikey = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
        senddata = 1                    # Enable sending data to Emoncms.org
        sendstatus = 1                  # Enable sending WAN IP to Emoncms.org MyIP > https://emoncms.org/myip/list
        sendinterval= 30                # Bulk send interval to Emoncms.org in seconds

#######################################################################
#######################          Nodes          #######################
#######################################################################

[nodes]

## See config user guide: https://github.com/openenergymonitor/emonhub/blob/emon-pi/conf/emonhub.conf

[[5]]
    nodename = emonpi
    [[[rx]]]
        names = power1,power2,power1pluspower2,vrms,t1,t2,t3,t4,t5,t6,pulsecount
        datacodes = h, h, h, h, h, h, h, h, h, h, L
        scales = 1,1,1,0.01,0.1,0.1,0.1,0.1,0.1,0.1,1
        units = W,W,W,V,C,C,C,C,C,C,p

[[6]]
    nodename = emontxshield
    [[[rx]]]
       names = power1, power2, power3, power4, vrms
       datacode = h
       scales = 1,1,1,1,0.01
       units = W,W,W,W,V

[[7]]
   nodename = emontx4
   [[[rx]]]
      names = power1, power2, power3, power4, vrms, temp1, temp2, temp3, temp4, temp5, temp6, pulse
      datacodes = h,h,h,h,h,h,h,h,h,h,h,L
      scales = 1,1,1,1,0.01,0.1,0.1, 0.1,0.1,0.1,0.1,1
      units = W,W,W,W,V,C,C,C,C,C,C,p

[[8]]
    nodename = emontx3
    [[[rx]]]
       names = power1, power2, power3, power4, vrms, temp1, temp2, temp3, temp4, temp5, temp6, pulse
       datacodes = h,h,h,h,h,h,h,h,h,h,h,L
       scales = 1,1,1,1,0.01,0.1,0.1, 0.1,0.1,0.1,0.1,1
       units = W,W,W,W,V,C,C,C,C,C,C,p

[[9]]
   nodename = emontx2
   [[[rx]]]
      names = power1, power2, power3, power4, vrms, temp1, temp2, temp3, temp4, temp5, temp6, pulse
      datacodes = h,h,h,h,h,h,h,h,h,h,h,L
      scales = 1,1,1,1,0.01,0.1,0.1, 0.1,0.1,0.1,0.1,1
      units = W,W,W,W,V,C,C,C,C,C,C,p

[[10]]
    nodename = emontx1
    [[[rx]]]
       names = power1, power2, power3, power4, vrms, temp1, temp2, temp3, temp4, temp5, temp6, pulse
       datacodes = h,h,h,h,h,h,h,h,h,h,h,L
       scales = 1,1,1,1,0.01,0.01,0.01,0.01,0.01,0.01,0.01,1
       units = W,W,W,W,V,C,C,C,C,C,C,p

[[11]]
    nodename = 3phase
    [[[rx]]]
       names = powerL1, powerL2, powerL3, power4, Vrms, temp1, temp2, temp3, temp4, temp5, temp6, pulse
       datacodes = h,h,h,h,h,h,h,h,h,h,h,L
       scales = 1,1,1,1,0.01,0.01,0.01,0.01,0.01,0.01,0.01,1
       units = W,W,W,W,V,C,C,C,C,C,C,p

[[12]]
    nodename = 3phase2
    [[[rx]]]
       names = powerL1, powerL2, powerL3, power4, Vrms, temp1, temp2, temp3, temp4, temp5, temp6, pulse
       datacodes = h,h,h,h,h,h,h,h,h,h,h,L
       scales = 1,1,1,1,0.01,0.01,0.01,0.01,0.01,0.01,0.01,1
       units = W,W,W,W,V,C,C,C,C,C,C,p

[[13]]
    nodename = 3phase3
    [[[rx]]]
       names = powerL1, powerL2, powerL3, power4, Vrms, temp1, temp2, temp3, temp4, temp5, temp6, pulse
       datacodes = h,h,h,h,h,h,h,h,h,h,h,L
       scales = 1,1,1,1,0.01,0.01,0.01,0.01,0.01,0.01,0.01,1
       units = W,W,W,W,V,C,C,C,C,C,C,p

[[14]]
    nodename = 3phase4
    [[[rx]]]
       names = powerL1, powerL2, powerL3, power4, Vrms, temp1, temp2, temp3, temp4, temp5, temp6, pulse
       datacodes = h,h,h,h,h,h,h,h,h,h,h,L
       scales = 1,1,1,1,0.01,0.01,0.01,0.01,0.01,0.01,0.01,1
       units = W,W,W,W,V,C,C,C,C,C,C,p

[[15]]
    nodename = emontx3cm15
    [[[rx]]]
       names = MSG, Vrms, P1, P2, P3, P4, E1, E2, E3, E4, T1, T2, T3, pulse
       datacodes = L,h,h,h,h,h,l,l,l,l,h,h,h,L
       scales = 1,0.01,1,1,1,1,1,1,1,1,0.01,0.01,0.01,1
       units = n,V,W,W,W,W,Wh,Wh,Wh,Wh,C,C,C,p
       whitening = 1

[[16]]
    nodename = emontx3cm16
    [[[rx]]]
       names = MSG, Vrms, P1, P2, P3, P4, E1, E2, E3, E4, T1, T2, T3, pulse
       datacodes = L,h,h,h,h,h,l,l,l,l,h,h,h,L
       scales = 1,0.01,1,1,1,1,1,1,1,1,0.01,0.01,0.01,1
       units = n,V,W,W,W,W,Wh,Wh,Wh,Wh,C,C,C,p
       whitening = 1

[[19]]
   nodename = emonth1
   [[[rx]]]
      names = temperature, external temperature, humidity, battery
      datacode = h
      scales = 0.1,0.1,0.1,0.1
      units = C,C,%,V

[[20]]
   nodename = emonth2
   [[[rx]]]
      names = temperature, external temperature, humidity, battery
      datacode = h
      scales = 0.1,0.1,0.1,0.1
      units = C,C,%,V

[[21]]
   nodename = emonth3
   [[[rx]]]
      names = temperature, external temperature, humidity, battery
      datacode = h
      scales = 0.1,0.1,0.1,0.1
      units = C,C,%,V

[[22]]
   nodename = emonth4
   [[[rx]]]
      names = temperature, external temperature, humidity, battery
      datacode = h
      scales = 0.1,0.1,0.1,0.1
      units = C,C,%,V

[[23]]
    nodename = emonth5
    [[[rx]]]
       names = temperature, external temperature, humidity, battery, pulsecount
       datacodes = h,h,h,h,L
       scales = 0.1,0.1,0.1,0.1,1
       units = C,C,%,V,p

[[24]]
    nodename = emonth6
    [[[rx]]]
       names = temperature, external temperature, humidity, battery, pulsecount
       datacodes = h,h,h,h,L
       scales = 0.1,0.1,0.1,0.1,1
       units = C,C,%,V,p

[[25]]
    nodename = emonth7
    [[[rx]]]
       names = temperature, external temperature, humidity, battery, pulsecount
       datacodes = h,h,h,h,L
       scales = 0.1,0.1,0.1,0.1,1
       units = C,C,%,V,p

[[26]]
    nodename = emonth8
    [[[rx]]]
       names = temperature, external temperature, humidity, battery, pulsecount
       datacodes = h,h,h,h,L
       scales = 0.1,0.1,0.1,0.1,1
       units = C,C,%,V,p

what can i do next?
thanks

Obiefuna_Obidike · 2022-06-01T09:48:30.510Z

thanks for your feedback, pleqase where can i see post you have written on the swapped Tx and Rx.

also i have tried to take a picture of the emonTx and rpi up-close to show how i connected it.

20220601_1023071908×4032 381 KB

20220601_1045371908×4032 676 KB

did i do it wrong?

dlmpryor · 2022-06-01T09:59:39.156Z

Is your serial port enable on the RPI 4??
Enable uart5 for Serial hardware to be enabled.
SSH into the RPI4
Run command: ls -l /dev/ttyA*

sudo nano /boot/config.txt
dtoverlay=uart5
/dev/ttyAMA0
/dev/ttyAMA1

Obiefuna_Obidike · 2022-06-01T10:54:09.436Z

i have been able to run the ls -l /dev/ttyA* and sudo nano /boot/config.txt commands on RPI 4

20220601_1149161920×909 117 KB

am i to add the

dtoverlay=uart5
/dev/ttyAMA0
/dev/ttyAMA1

on a new line or change one of the dtoverlay in the config?

Obiefuna_Obidike · 2022-06-01T11:36:38.910Z

i have just edited the config file and modified the interfacers

now i get some readings on the input page

711592×556 21.8 KB

my Log now logs in 3 values

701567×679 155 KB

am i on the right path? and how do i get other values because i can see it reads without even connecting a Ct sensor

borpin · 2022-06-01T12:04:19.379Z

Obiefuna_Obidike:

am i on the right path? and how do i get other values because i can see it reads without even connecting a Ct sensor

No, you need to power down the TX and Pi, connect the CT and then power back up to get the readings.

Obiefuna_Obidike · 2022-06-01T15:11:22.158Z

thanks that fixed it. i now see reading of P and E as well.

711593×441 24.5 KB

please can do you know where i can learn how to calibrate the ct sensor?

thank you for your help

Robert.Wall · 2022-06-01T18:37:11.391Z

Obiefuna_Obidike:

please can do you know where i can learn how to calibrate the ct sensor?

Look in the ‘Learn’ section. There is a lot of very useful background information on many aspects of energy monitoring there. Look around to see the sort of information there is, then go to “Electricity Monitoring → Current & Voltage”. The full instructions are there.