# P1 smartmeter (API) **URL:** \ **Category:** Apps\ **Created:** [January 1, 2019, 12:22pm UTC](https://community.homey.app/t/p1-smartmeter-api/6150 "2019-01-01T12:22:22Z")\ **Posts on this page:** 20\ **Page:** 2
**Author:** ![Koktail](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/koktail/32/51498_2.png) [@Koktail](https://community.homey.app/u/Koktail)\ **Post date:** [February 1, 2019, 6:33am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/21 "2019-02-01T06:33:56Z")
I’ll have a look to make those changes. It sound very logic indeed. Think i’ll split the P1 in two different devices: Electricity and Gas that way there is also room for the `low` and `high` channels. ---
**Author:** ![Koktail](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/koktail/32/51498_2.png) [@Koktail](https://community.homey.app/u/Koktail)\ **Post date:** [February 1, 2019, 6:35am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/22 "2019-02-01T06:35:27Z")
Can you add this to a git repository? Then I’ll link to this in the readme of the app. ---
**Author:** ![Koktail](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/koktail/32/51498_2.png) [@Koktail](https://community.homey.app/u/Koktail)\ **Post date:** [February 1, 2019, 6:53am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/23 "2019-02-01T06:53:40Z")
I’ve added an issue on GH: [https://github.com/koktaildotcom/com.p1.smartmeter/issues/3](https://github.com/koktaildotcom/com.p1.smartmeter/issues/3) ---
**Author:** ![Gerard](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/gerard/32/8846_2.png) [@Gerard](https://community.homey.app/u/Gerard)\ **Post date:** [February 1, 2019, 11:17am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/24 "2019-02-01T11:17:06Z")
Seems a bit odd to start a git repository for just this Q&D script. Feel free to put the script in the example directory as an unsupported way to reproduce the steps some other guy (me 🙂 ) took to make use of your beautiful com.p1 app on the homey. You might want to add two lines of comment to make the steps even more clear: ``` # 1-0:2.8.2 delivered_tariff2, hack string to proper numeric value # From "1-0:1.8.2(01259.637*kWh)" To: "01259.637" tdelivered_tariff2=`/bin/grep "1-0:2.8.2" /tmp/smarttelegram.txt | /bin/sed "s/.*(//;s/\*.*//"` # From: "01259.637" To: "1259.637" delivered_tariff2=$(/usr/bin/awk "BEGIN {printf \"%.3f\",$tdelivered_tariff2}") ``` And rereading my statement from yesterday about the ELECTRICITY DELIVERED idea… we would always have a confusion about what delivered energy actually is, to the house or to the grid? On this second thought, I reckon it would be best to avoid DELIVERED altogether and go for ‘ELECTRICITY USED’ and ‘ELECTRICITY PRODUCED’. Produced is technically not correct either (since it is solar production minus electricity used in the house), but I think it is the most intuitive wording of what the value is showing. If people ask why I use full pathnames in my scripts, I like to know what version of a command I am using and to avoid being ‘hacked’ by a script that says grep and is in my search path and does a grep _and_ make a local user root. I typically use defines in the beginning of my shell scripts, like: AWK=/usr/bin/awk and use them in the commands like delivered\_tariff2=$($AWK “BEGIN {printf “%.3f”,$tdelivered\_tariff2}”) In example code that seems a bit odd however, but that is how the script is running here. If for anything, I like the fact that this bash script is providing a more or less readable explanation of what your script part on the raspberry is actually doing. Which might be helpful in debugging. ---
**Author:** ![Patrick1610](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/patrick1610/32/6843_2.png) [@Patrick1610](https://community.homey.app/u/Patrick1610)\ **Post date:** [April 5, 2019, 3:33pm UTC](https://community.homey.app/t/p1-smartmeter-api/6150/25 "2019-04-05T15:33:00Z")
This looks very promising to integrate my (just installed) smart meter with Homey. I have a spare Raspberry Pi lying around, but I wouldn’t know where to start to get the readings from the meter to the P1 app on Homey? Could anyone help me looking in the good direction or has a nice guide for me? ---
**Author:** ![prosumer](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/prosumer/32/166478_2.png) [@prosumer](https://community.homey.app/u/prosumer)\ **Post date:** [April 20, 2019, 8:15pm UTC](https://community.homey.app/t/p1-smartmeter-api/6150/26 "2019-04-20T20:15:06Z")
Thank you for creating and sharing this! Can one use a [Raspberry Pi Zero W](https://www.raspberrypi.org/products/raspberry-pi-zero-w/) to run this script? Reason for asking: I noticed that the memory usage increases to around 90% within half an hour after starting the script, while [Homebridge](https://github.com/nfarina/homebridge) running on a [Pi 3 Model B+](https://www.raspberrypi.org/products/raspberry-pi-3-model-b-plus/) stays around 5% when running for days/weeks. ---
**Author:** ![Marlon](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/marlon/32/3794_2.png) [@Marlon](https://community.homey.app/u/Marlon)\ **Post date:** [April 21, 2019, 4:31am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/27 "2019-04-21T04:31:17Z")
While I’m not using the app, I do use a Raspberry Pi to publish smartmeter data to an MQTT Host. Maybe this script can help you out a bit. > **P1 smartmeter.py** > > ``` > #!/usr/bin/env python > # Python script om P1 telegram weer te geven in Node-RED > import datetime > import re > import serial > import paho.mqtt.publish as publish > from time import sleep > > # Settings > MQTT_HOST = "192.168.1.38" > MQTT_PORT=32772 > MQTT_USER="user" > MQTT_PASS="password" > MQTT_TOPIC="meter" > MQTT_AUTH = { > "username": MQTT_USER, > "password": MQTT_PASS > } > > T_SLEEP = 15 > # Seriele poort confguratie > ser = serial.Serial() > > # DSMR 4.0/4.2 > 115200 8N1: > ser.baudrate = 115200 > ser.bytesize = serial.EIGHTBITS > ser.parity = serial.PARITY_NONE > ser.stopbits = serial.STOPBITS_ONE > > ser.xonxoff = 0 > ser.rtscts = 0 > ser.timeout = 12 > ser.port = "/dev/ttyUSB0" > ser.close() > > kwhtot = 0 > kwhoud = 0 > kwhverschil = 0 > > gastot = 0 > gasoud = 0 > gasverschil = 0 > > while True: > try: > ser.open() > checksum_found = False > gasflag = 0 > kwh1 = 0 > kwh2 = 0 > gas = 0 > watt = 0 > rawdata = [] > > while not checksum_found: > telegram_line = ser.readline() # Lees een seriele lijn in. > telegram_line = telegram_line.decode('ascii').strip() # Strip spaties en blanke regels > rawdata.append(telegram_line) > > if re.match(b'(?=1-0:1.7.0)', telegram_line): #1-0:1.7.0 = Actueel verbruik in kW 1-0:1.7.0(0000.54*kW) > kw = telegram_line[10:-4] # Knip het kW gedeelte eruit (0000.54) > watt = float(kw) * 1000 # vermengvuldig met 1000 voor conversie naar Watt (540.0) > watt = int(watt) # rond float af naar heel getal (540) > > if re.match(b'(?=1-0:1.8.1)', telegram_line): #1-0:1.8.1 - Hoog tarief / 1-0:1.8.1(13579.595*kWh) > kwh1 = telegram_line[10:-5] # Knip het kWh gedeelte eruit (13579.595) > > if re.match(b'(?=1-0:1.8.2)', telegram_line): #1-0:1.8.2 - Laag tarief / 1-0:1.8.2(14655.223*kWh) > kwh2 = telegram_line[10:-5] # Knip het kWh gedeelte eruit (14655.223) > > if gasflag == 1: > gasflag = 0 > > if re.match(b'(?=0-1:24.2.1)', telegram_line): #0-1:24.2.1 - Gasverbruik > gasflag = 1 > if gasoud < 1:gas = float(telegram_line[26:-4]) > > # Check wanneer het uitroepteken ontvangen wordt (einde telegram) > if re.match(b'(?=!)', telegram_line): > checksum_found = True > > ser.close() > > # MQTT PUBLISH > publish.single(MQTT_TOPIC + "/electricity", watt, hostname=MQTT_HOST, port=MQTT_PORT, auth=MQTT_AUTH) > publish.single(MQTT_TOPIC + "/gas", gas, hostname=MQTT_HOST, port=MQTT_PORT, auth=MQTT_AUTH) > publish.single(MQTT_TOPIC + "/telegram", "\n".join(rawdata), hostname=MQTT_HOST, port=MQTT_PORT, auth=MQTT_AUTH) > except Exception as err: > try: > publish.single(MQTT_TOPIC + "/error", err, hostname=MQTT_HOST, port=MQTT_PORT, auth=MQTT_AUTH) > except: > pass > sleep(T_SLEEP) > > ``` The idea I got from this [site](http://domoticx.com/p1-poort-slimme-meter-data-naar-node-red-mqtt/) ---
**Author:** ![prosumer](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/prosumer/32/166478_2.png) [@prosumer](https://community.homey.app/u/prosumer)\ **Post date:** [April 21, 2019, 8:01am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/28 "2019-04-21T08:01:30Z")
For the second night in a row (i.e., every night since I’m experimenting with this) the Pi (Zero) is completely unresponsive in the morning. I have to power it off and on again to be able to SSH into it. 😢 ---
**Author:** ![prosumer](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/prosumer/32/166478_2.png) [@prosumer](https://community.homey.app/u/prosumer)\ **Post date:** [April 21, 2019, 8:05am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/29 "2019-04-21T08:05:05Z")
When I checked this morning the Homey App reported an extremely high current usage of gas (almost equal to the total amount of gas used since the smart meter got installed). Known issue or new bug? How can I delete the faulty data sample? ---
**Author:** ![Fabien\_Schmitz](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/fabien_schmitz/32/8472_2.png) [@Fabien\_Schmitz](https://community.homey.app/u/Fabien_Schmitz)\ **Post date:** [May 15, 2019, 7:56pm UTC](https://community.homey.app/t/p1-smartmeter-api/6150/30 "2019-05-15T19:56:12Z")
do you use the node-p1-reader example js script for this? ---
**Author:** ![prosumer](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/prosumer/32/166478_2.png) [@prosumer](https://community.homey.app/u/prosumer)\ **Post date:** [May 16, 2019, 5:32am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/31 "2019-05-16T05:32:03Z")
Yes, I use the (fork of the) P1-Reader script that uploads data to the Homey. ---
**Author:** ![Fabien\_Schmitz](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/fabien_schmitz/32/8472_2.png) [@Fabien\_Schmitz](https://community.homey.app/u/Fabien_Schmitz)\ **Post date:** [May 16, 2019, 6:54am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/32 "2019-05-16T06:54:38Z")
Ah okay, I try to use it too… but it uses a lot of memory (\>700Mb) and CPU on a Pi 3B … and after a few Hours it crashes and even pm2 is not able to keep it “Alive” but it is a really easy task , read serial, parse and push data… so i’m Not sure what the problem is … is this something you Experience too? ---
**Author:** ![prosumer](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/prosumer/32/166478_2.png) [@prosumer](https://community.homey.app/u/prosumer)\ **Post date:** [May 16, 2019, 9:14am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/33 "2019-05-16T09:14:53Z")
I limited the memory Node.js can use and removed logging to the console. The script is still using almost all resources, but I have received data for more than a week now. ---
**Author:** ![Crashy](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/crashy/32/7688_2.png) [@Crashy](https://community.homey.app/u/Crashy)\ **Post date:** [July 23, 2019, 8:16am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/34 "2019-07-23T08:16:38Z")
Maybe someone can help me with the steps, beacause it’s not working for me yet… I know that my P1 cable is connected correctly to my Raspberry Pi because I can get live readings with command “cu -l /dev/ttyUSB0 -s 115200” I’m not sure what to fill in in the examples file in the port section, because should it be /dev/ttyUSB0? Or should it be /dev/tty-usbserial1 If I leave those lines uncommented, it’s not working… Also, there’s no possibility for settings in Homey. Please help! ---
**Author:** ![PetervdK](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/petervdk/32/20669_2.png) [@PetervdK](https://community.homey.app/u/PetervdK)\ **Post date:** [July 23, 2019, 10:05am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/35 "2019-07-23T10:05:47Z")
My P1 has 2 connections. One RJ11 port to the smart meter and one RJ45 port to the network. If you put the network cable into your RPi, then Homey won’t be able to see it in your network and will not be able to connect to or use it. Or am i completely wrong? ---
**Author:** ![MadMax](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/madmax/32/10306_2.png) [@MadMax](https://community.homey.app/u/MadMax)\ **Post date:** [August 1, 2019, 11:20am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/36 "2019-08-01T11:20:42Z")
@Koktail Is it possible to extend the P1 App so that the smartmeter-obis counter (SmlProtocol,D0Protocol,JsonEfrProtocol) can also be read and these are visible in the Homey App? smartmeter-obis: > **[smartmeter-obis](https://www.npmjs.com/package/smartmeter-obis)** > > This library supports the reading and parsing of smartmeter protocols that follow the OBIS number logic to make their data available. ---
**Author:** ![lucasvdh](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/lucasvdh/32/54915_2.png) [@lucasvdh](https://community.homey.app/u/lucasvdh)\ **Post date:** [October 15, 2019, 8:46am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/37 "2019-10-15T08:46:47Z")
I don’t see any functionality in the smartmeter-obis package for posting the read result to and endpoint (which would be Homey). How did you envision using this? My guess is that this would require writing a new package which implements the smartmeter-obis package and sends the data to Homey. Basically another implementation of [https://github.com/koktaildotcom/node-p1-reader](https://github.com/koktaildotcom/node-p1-reader) but then implement smartmeter-obis to read the data. ---
**Author:** ![Onno](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/onno/32/12663_2.png) [@Onno](https://community.homey.app/u/Onno)\ **Post date:** [November 12, 2019, 9:39am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/38 "2019-11-12T09:39:01Z")
I’m also running on a RBPI ZeroW, I’ve disabled logging to console and limited memory for node.js using -node --max-old-space-size=“Value”. I’m unable to find the perfect setting. Or process runs out of memory, or RBPI running out of memory. What are the setting’s you are using? Aside from this, why is memory usage this high? If I understand correctly it should be read --\> parse --\> post --\> forget… Right? ---
**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\ **Post date:** [November 12, 2019, 9:44am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/39 "2019-11-12T09:44:23Z")
> [@Onno](#): > > why is memory usage this high Likely a memory leak. ---
**Author:** ![Onno](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/onno/32/12663_2.png) [@Onno](https://community.homey.app/u/Onno)\ **Post date:** [November 12, 2019, 9:53am UTC](https://community.homey.app/t/p1-smartmeter-api/6150/40 "2019-11-12T09:53:18Z")
Ok, is this fixable by changing the code of the script or should I do something else? [Previous page](https://community.homey.app/t/p1-smartmeter-api/6150.md?page=1) [Next page](https://community.homey.app/t/p1-smartmeter-api/6150.md?page=3)