PCF8574: ports on at startup about sonoff-tasmota HOT 9 CLOSED

Update:

The first problem concerning low voltage has been more or less resolved. When I measured 1.7 volts it was with the LED and a 220R resistor attached. Without the LED I got 2.45 volts, so I simply used a smaller resistor than what I would usually use. Meanwhile, I solved the problem with the relay by using a MOFSET between the PCF8547 port and the module's trigger pin.

The second issue unfortunately hasn't been resolved yet. The PCF8547 ports are on at startup while the GUI indicates that it's off, so I still need to turn the port on and off at the beginning. I probably can write a rule to do this, but I don't like the idea of having the relays and LEDs quickly switch on and then off when starting or rebooting the device.

from sonoff-tasmota.

I will try on the weekend to reproduce this. I do not see the issue with the release I loaded into my watering equipment

from sonoff-tasmota.

Thanks. By the way, here is the workaround I am currently using. It's a rule which switches all ports on and then off again:

on Power1#Boot do backlog power0 on; RuleTimer1 1 endon on Rules#Timer=1 do power0 off endon

When the system starts the ports are on for about three seconds and then switch off. The web GUI is also subsequently synced as a result.

Since I will be using the PCF8574 on a board with 4 relays connected to lights which can be turned on not only by WiFi but also RF433 as well as a manual switch, it's not that bad because hopefully it doesn't have to be powered on or reset often. Still, when it does (such as in the case of a power failure) it's nevertheless a little strange to have all four sets of lights turn on for a few seconds at the beginning.

from sonoff-tasmota.

if i make all 8 as output..its working fine with relay. but one problem i am facing is if all the 8 relays are on.. while restarting none of the relay is in onstate. but in web interface it show all are on. if i off one relay all are getting on except the one which is off

from sonoff-tasmota.

Ok, this looks like the current state is not send on the init process. I will fix this in the master tasmota and propagate here. Please change to the original tasmota, if possible because nearly all features are now in the main project

from sonoff-tasmota.

what i have to do now.. what means original tasmota.. if seven relays are on. if i restart no issue all are syns well. if all 8 relays are on..on restart problem arises.. none of the relay will get on. in web interface all the relays will be in on state. if i tried changing any one to off in web ui..it will on the remaining seven relays.

from sonoff-tasmota.

i compiled from development version

from sonoff-tasmota.

This issue has been automatically marked as stale because it hasn't any activity in last few weeks. It will be closed if no further activity occurs. Thank you for your contributions.

from sonoff-tasmota.

This issue was automatically closed because of being stale. Feel free to open a new one if you still experience this problem.

from sonoff-tasmota.