Have you re-checked the password for the Domoticz admin account? It needs the actual password in the Controller settings. After saving it will be replaced by a dummy in the page, to avoid it being scraped from the browser.
Does it contain some specific special characters?, as that could cause issues, though I haven't seen any reports of that recently.
You can also test the url you sent from the browser using the SendToHTTP command from the Tools page, but it probably needs to be split in 3 parts for that: The IP-address (no http:// prefix!), the port and the rest of the url, like:
Code: Select all
SendToHTTP,192.168.100.???,8080,/json.htm?username=admin=&password=***encodedpassword**&type=command¶m=udevice&idx=44&nvalue=0&svalue=4
Fill in the 4th byte of the Domoticz IP address instead of the ???