UDP link is not valid

[aahondema]

Hi,
I'm having troubles sending data to a syslog server. I use the syslog.h library for it. Data is send via UDP. Whenever I send data to this server I get the following messages:

21:21:04.818 -> > sendDataUdp: 3 15
21:21:04.818 -> > sendDataUdp: 192.168.68.104 514
21:21:04.865 -> [WiFiEsp] AT+CIPSEND=3,15,"192.168.68.104",514
21:21:04.958 -> link is not valid

As you can see I altered the debugging option from WIFIESP to 4 to get more info. The syslog server is on the mentioned IP number and on port 514. The WiFi connection is up and running, I also send message to a MQTT server and those are send without any problems. I have been trying for hours to get this working but with no result. I also have a nodemcu on which I use another WiFi library (WiFi8266) and there I can send syslog messages without a problem. I have no idea what causes the 'link is not valid' message.

Any ideas please??

Adrian

[JAndrassy]

you didn't call begin. some WiFi libraries including this one require to call begin on UDP even if you don't want to listen for UDP messages, but only send a message.

if you can update AT firmware to AT 1.7.4 (SDK 3), then you can use my WiFiEspAT library which is better

[aahondema]

YES, that's it! Thank you very, very much Jan!

[JAndrassy]

YES, that's it! Thank you very, very much Jan!

it is Juraj Andrassy

[aahondema]

Ah, I mis-interpreted your name, thought it was Jan Drassy :). Sorry fot that! Nevertheless, thanks again Juraj!
Adrian