Sending sms commands

Have some forum teaching how to configure sms sending via SMPP?

There is no configuring. As long as you have SMPP service configured, you can send commands via SMS.

invalid parameter or constraint violation

SMPP client is not enabled - RuntimeException (BaseProtocol:106 < CommandsManager:59 < CommandResource:72 < ...)

Have you read my comment? Have you configured SMPP?

Hi you need a smpp provider, some sms providers can do this but you may need to ask to enable it and get login details.

Then all we did was put this in config

    <entry key='sms.smpp.enable'>true</entry>
    <entry key='sms.smpp.host'>SMPP ADDRESS</entry>
    <entry key='sms.smpp.port'>PORT</entry>
    <entry key='sms.smpp.username'>USERNAME</entry>
    <entry key='sms.smpp.password'>PASSWORD</entry>
    <entry key='sms.smpp.notificationsCharset'>GSM</entry>
    <entry key='sms.smpp.notificationsDataCoding'>0</entry>
    <entry key='sms.smpp.sourceAddress'>SMPP INFO</entry>

Sorry for the rudeness but I'm configuring the server now I'm still looking for information to do everything from scratch.
I am trying to configure the platform to send commands via sms to the crawlers, do you have any topic with that subject or documentation?

Here you can find documentation for configuring SMPP server:

https://www.traccar.org/documentation/notifications/