Unable to connect 1wire temp-sensors, how to configure 1wire interface?
I am not able to connect any number of DS18B20-sensors (single one straight to the port or through the 1wire 8port hub).
I'm using the pinout as described on: https://www.unipi.technology/tutorial/topology-of-1-wire-network-46
It seems strange to me that even with nothing connected i see the below:
pi@unipi:/sys/bus/w1/devices $ ls 00-7a0000000000 00-ba0000000000 w1_bus_master1
The seem to be dummy devices as their id's change over time, both of them missing the w1_slave-file
it makes me think that I'm missing a configuration step, i am however unable to find any notion what i need to configure.
The UniPi M20x is corrently running Rasbian Stretch with Evok (https://github.com/UniPiTechnology/evok#testing-latest-git-versions)
Evok lists 1wire as empty but this might be because i have not configured it properly:
#!! don't use # for inline comments [MAIN] log_level = ERROR ; one of INFO, DEBUG, WARNING, ERROR, CRITICAL log_file = /var/log/evok.log webname = unipi-neuron staticfiles = /var/www/evok ;password = ;rpcpassword = secret = port = 80 enable_cors = False cors_domains = * modbus_port = 0 #modbus_address = 127.0.0.1 modbus_address = * [NEURON_1] scan_frequency = 2 scan_enabled = True [OWBUS_1] owbus = --i2c=/dev/i2c-1:ALL ; scanned bus (--i2c=/dev/i2c-1:ALL or localhost:2122 or 'u' for USB dongle) interval = 3 ; [s] default sensor reading scan_interval = 300 ; [s] how often is made searching
How did you, friendly forum member, get 1wire to work?
Solved the problem, I did two things wrong:
- I had enabled the 1wire-interface through raspi-config, turning this off made the sensor show up in evok
- I had two bad sensors connected to the hub
1Wire Sensors/Devices Sensor DS18B20 - 28FF896672150104: 19.1°C Sensor DS18B20 - 28FF1FDF7215012D: 20.1°C Sensor DS18B20 - 28FF71B761150300: 39.5°C Sensor DS18B20 - 28FF147F611502B8: 37.9°C Sensor DS18B20 - 28FFFEA162150371: 20.6°C Sensor DS18B20 - 28FF55B66215038C: 45.6°C