How to use MQTTPUB or MQTTPUBSEND to send binary data?

Question

I’m using wizfi360 module, with fw version 1.1.2.0 it is correctly connected on MQTT server. 1-MQTTPUBSEND=15
 return always ERROR 2-MQTTPUB=“xxxxxx”
 alway work correctly if xxxxx is an ASCII string, if i try to send binary data I have a lot problems: I can’t trasmit 0x00,0x08,0x0A this is my code tx_stringa_wifi(“AT+MQTTPUB=,\0”); tx_dato_wifi(0x22); for (i = 1; i < 256; i++) { if (i != 10 && i != 8) tx_dato_wifi(i); } tx_dato_wifi(48); tx_dato_wifi(0x22); tx_dato_wifi(0x0D); tx_dato_wifi(0x0A); It works correctly if I don’t send 0,8,10 otherways it stops sending. How can i solve this problem?

scarlet · Answer

Hello, this is scarlet. First of all, [MQTTPUB] is a command used for general strings. It is correct to use the [MQTTPUBSEND] command for binary data. I am attaching the screen that I tested here. It appears that you have written code to send a message from the MCU via UART. If you’re using a module, have you tried sending commands using a serial program (ex. tera term)? When developing with WizFi360, we recommend verifying the command transmission process with a serial program before proceeding with development on the MCU side. If there’s an issue when testing with the serial program, please attach the log and feel free ask to me.