Hi,
I have a problem with my 1-wire network which someone may be able to shed some light on please ?
I have a number of 1-wire devices, mainly using Hobby boards kit as shown :-
PC Port --> HB 1-Wire Temp Board ---> HB 6 Channel Hub
Hub Ch 1 Main --> HB 1W Temp
Hub Ch 1 Aux --> No connection
Hub Ch 2 Main --> HB 1W Temp
Hub Ch 2 Aux --> No connection
Hub Ch 3 Main --> HB 1W Temp & Hum, HB 1W Temp, DS18B20, DS18B20, DS18B20, DS18B20
Hub Ch 3 Aux --> No connection
All of the temperature detectors are in parasitic mode.
The DS18B20's on CH3 are all taped to my heating pipes and "dropped" of the 1-wire network. They seemed to work reliably until the weekend. We had a power outage and when the power came back, all of the devices on Ch3 Main were not visible on the network. I thought that the power outage had taken out one channel of the hub as the devices became visible again when I connected them to another hub channel.
However, a few hours later, the devices then disappeared. Changing their channel or resetting (power off/on) the hub had no effect so I began to suspect a failed device. I identified the rogue device by adding devices back to the network leg in turn until the devices disappeared again - success ! Having found the bad device, I expected to be able to confirm that by using the one-wire viewer. However, the one-wire viewer successfully reads the device. When put back on the network, the rest of the devices disappear again.
So, at last, a question....
Could there be a failure mode wherby the device could happily communicate on its own but prevent devices sharing the network (including itself) from working ? As I seem to have got round the problem, this is not really an urgent issue - I'd just like to know what might be happening,
regards
Dave
I have a problem with my 1-wire network which someone may be able to shed some light on please ?
I have a number of 1-wire devices, mainly using Hobby boards kit as shown :-
PC Port --> HB 1-Wire Temp Board ---> HB 6 Channel Hub
Hub Ch 1 Main --> HB 1W Temp
Hub Ch 1 Aux --> No connection
Hub Ch 2 Main --> HB 1W Temp
Hub Ch 2 Aux --> No connection
Hub Ch 3 Main --> HB 1W Temp & Hum, HB 1W Temp, DS18B20, DS18B20, DS18B20, DS18B20
Hub Ch 3 Aux --> No connection
All of the temperature detectors are in parasitic mode.
The DS18B20's on CH3 are all taped to my heating pipes and "dropped" of the 1-wire network. They seemed to work reliably until the weekend. We had a power outage and when the power came back, all of the devices on Ch3 Main were not visible on the network. I thought that the power outage had taken out one channel of the hub as the devices became visible again when I connected them to another hub channel.
However, a few hours later, the devices then disappeared. Changing their channel or resetting (power off/on) the hub had no effect so I began to suspect a failed device. I identified the rogue device by adding devices back to the network leg in turn until the devices disappeared again - success ! Having found the bad device, I expected to be able to confirm that by using the one-wire viewer. However, the one-wire viewer successfully reads the device. When put back on the network, the rest of the devices disappear again.
So, at last, a question....
Could there be a failure mode wherby the device could happily communicate on its own but prevent devices sharing the network (including itself) from working ? As I seem to have got round the problem, this is not really an urgent issue - I'd just like to know what might be happening,
regards
Dave