Sending/Receiving JSON via UDP/TCP

[paritosharya007]

I am trying to implement a simple solution for sending data using JSON via TCP/UDP. Here's what I have been doing so far (as understood from IoT Demo):

1) In user init, start a tcp connection and start receiving.
2) Parse incoming data in web server receive and call json_send.
3) Call json_ws_send, this in turn calls the JSON callback function which has set and get methods as defined below:

LOCAL struct jsontree_callback wifi_connect_ap_callback = JSONTREE_CALLBACK(connect_ap_get, connect_ap_set);

JSONTREE_OBJECT(ap_setting, JSONTREE_PAIR("ssid", &wifi_connect_ap_callback), JSONTREE_PAIR("password", &wifi_connect_ap_callback));
JSONTREE_OBJECT(wifi_tree, JSONTREE_PAIR("ap_details", &ap_setting));

But my problem is that json tree callback never calls the connect_ap_set ( which supposedly extracts the values from json tree to variable which I can then use to print on UART) but calls the connect_ap_get twice.

This is where I have run out of luck and haven't made any further headway.

Any simple solution for using JSON (IoT Demo is too complicated for new users) will be much helpful.

[jpenninkhof]

I've built a power strip that currently exchange json data with an MQTT broker. It parses and constructs json using the json functions in the EspressIf SDK. I don't think it's very complicated to comprehend. If you're interested, please have a look at the source code on https://github.com/jpenninkhof/esp_mqtt_switch.

If this doesn't get you started, please do let me know. Perhaps I'll just blog about it.