include device ID in POST message

[requireiot]

I want to use multiple Willow boxes, so my home automation engine needs to know which device sent a message. (I am using 2x ESP32-S3-Box-mini, with Multinet local speech recognition enabled, and the generic REST endpoint).

My current solution: in main/main.c, ca. line 179, change from

  json = calloc(sizeof(char), 29 + strlen(lookup_cmd_multinet(command_id)));
  snprintf(json, 29 + strlen(lookup_cmd_multinet(command_id)), "{\"text\":\"%s\",\"language\":\"en\"}",
      lookup_cmd_multinet(command_id));

to

   size_t jsonlen = 29 + strlen(lookup_cmd_multinet(command_id)) + 40;
   json = calloc(sizeof(char), jsonlen);
   snprintf(json, jsonlen, "{\"text\":\"%s\",\"language\":\"en\",\"siteId\":\"%s\"}",
      lookup_cmd_multinet(command_id), CONFIG_LWIP_LOCAL_HOSTNAME);

and then, before I flash each box, I change the CONFIG_LWIP_LOCAL_HOSTNAME parameter via utils.sh config

[kristiankielhofner]

We have begun implementing a broad approach to this that comes in two forms:

1. A Willow "group ID" for associated devices used in the same environment. This will be used for functionality such as Willows in earshot of one another should not all wake and stream on wake word #74.

2. A Willow "device ID". We will shortly have the ability to essentially use CONFIG_LWIP_LOCAL_HOSTNAME as a hostname base with the last four octets of the MAC address appended on boot. Like the group ID we will also support attaching this as a header and/or potentially in the JSON from the device as you have done.