Hi All, I am new to the mailing list and am hoping someone out there might be able to help us. We are currently working on a set of devices for monitoring endangered animal habitats and we need to try to read multiple 1wire temp sensor readings via RPI3. Specifically I am hoping to find someone with experience using OWFS on the Balena.io platform and Docker templates. I am looking for an example of OWFS measuring 1wire thermocouples via i2c hat running on Balena.io via a Dockerfile? The key here is to get it to work on Balena via a Dockerfile.template with i2c enabled as that is how we will manage fleets of these devices.
For those of you who aren't familiar with Balena.io it used to be called Resin.io until a few years ago. Balena is a great fleet management and deployment platform for managing multiple IOT devices. We use it for many RPI implementations. I highly recommend taking a few hours to learn how to deploy a device on their platform as once you start using it you won't go back. But my biggest hope is for one of you experts at OWFS to deploy OWFS via Balena onto a RPI3 with an i2c 1-wire hat so that you can share a solution on how to properly build a Dockerfile and python file for it that works. I have been trying to figure it out for days and getting nowhere. I am trying to use pyownet which might be part of my problem but I don't have to use that if you can think of a better way to do this. I would also like to stick to Python3 as Balena is dropping support for Python2 soon. I am sure Balena will be adopted by folks more and more moving forward so solving this would be a great investment in furthering the 1wire and owfs platform to be deployed in fleets. In this situation, it is also going towards a good cause of helping endangered animals. Below is my dockerfile & python code which I just can't get to work properly. I continue to get this error: pyownet.protocol.ConnError: [Errno 111] Connection refused This is the i2c device I am using: https://www.abelectronics.co.uk/kb/article/3/owfs-with-i2c-support-on-raspberry-pi Thanks so much, Greg ---------------------------------------- DOCKERFILE CODE BELOW ---------------------------------------- FROM balenalib/raspberrypi3-python:3.7.6 ENV DEBIAN_FRONTEND=noninteractive ENV DEBCONF_NOWARNINGS yes RUN apt-get update -y; \ apt-get upgrade -y; \ apt-get clean all RUN sudo apt-get update -y;\ apt-get install -qy apt-utils \ python3-pip \ python3 \ libtool \ python3-dev \ python3-smbus\ libtool \ rpi-update \ raspi-config \ owfs \ owserver \ ow-shell \ python-ow \ python3-rpi.gpio \ && apt-get clean && rm -rf /var/lib/apt/lists/* RUN sudo pip3 install setuptools --upgrade RUN sudo pip3 install --upgrade pip RUN sudo pip3 install pyownet RUN sed -i '20i\server: device=/dev/i2c-1' /etc/owfs.conf RUN sed -i 's/^server: FAKE = DS18S20,DS2405/#server: FAKE = DS18S20,DS2405/' /etc/owfs.conf RUN sed -i 's/^ftp: port = 2120/#ftp: port = 2120/' /etc/owfs.conf COPY . ./ ENV INITSYSTEM on CMD modprobe i2c-dev && owserver -d /dev/i2c- CMD ["python3", "1wire_temp_test.py"] ---------------------------------------- PYTHON CODE BELOW ---------------------------------------- import time from pyownet import protocol temp_type = 'F' tc_1_mac = 'FF8AD3641402' ### This is obviously my thermocouple so enter your own mac address here ### owproxy = protocol.proxy(host="localhost", port=4304) sensor_file_1 = '/28.' + tc_1_mac + '/temperature' def main(): while True: try: thetext = owproxy.read(sensor_file_1) heater_temp_1 = round((float(thetext[2:])*(9/5)+32),2) print ('SENSOR #1 =', heater_temp_1, temp_type) except IOError: print ('SENSOR #1 READ FAIL') time.sleep(10) if __name__ == '__main__': main()
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