Turn on 2 LED's at a particular time in C mongoose os

Question

So I have an espressif chip connected to 2 LEDs, and mongoose os runs on it

I would like to get time from the internet/computer and make the led's turn on at a particular time.

eg. at 10:00 turn on/off led 1 connected to pin 2 and at 16:00 turn on/off led 2 connected to pin 3 in C.

Answer 1

Step 1: Add wifi setup to your mos.yml so it can connect to your wireless AP:

config_schema:
  - ["wifi.sta.enable", true]
  - ["wifi.sta.ssid", "MyAP"]
  - ["wifi.sta.pass", "Passwd"]

Step 2: Add these to your mos.yml. Leave off rpc-uart if you have no intention of making rpc calls over UART.

libs:
  - origin: https://github.com/mongoose-os-libs/sntp
  - origin: https://github.com/mongoose-os-libs/crontab
  - origin: https://github.com/mongoose-os-libs/rpc-service-cron
  - origin: https://github.com/mongoose-os-libs/rpc-service-config
  - origin: https://github.com/mongoose-os-libs/wifi
  - origin: https://github.com/mongoose-os-libs/rpc-uart

Step 3: Add crontab handlers for LED on and LED off:

enum mgos_app_init_result mgos_app_init(void) {
  /* Set LED GPIOs as outputs */
  mgos_gpio_set_mode(YOUR_LED_GPIO, MGOS_GPIO_MODE_OUTPUT);

  /* Register crontab handler - LED OFF */
  mgos_crontab_register_handler(mg_mk_str("ledoff"), ledoff, NULL);

  /* Register crontab handler - LED ON */
  mgos_crontab_register_handler(mg_mk_str("ledon"), ledon, NULL);

  return MGOS_APP_INIT_SUCCESS;
}

Step 4: Add callbacks:

void ledoff(struct mg_str action, struct mg_str payload, void *userdata) {
  mgos_gpio_write(YOUR_LED_GPIO, 0);
  (void) payload;
  (void) userdata;
  (void) action;
}

void ledon(struct mg_str action, struct mg_str payload, void *userdata) {
  mgos_gpio_write(YOUR_LED_GPIO, 1);
  (void) payload;
  (void) userdata;
  (void) action;
}

Step 5: From Web UI or UART:

call Cron.Add '{"at":"0 0 10 00 * *", "action":"ledon"}'
call Cron.Add '{"at":"0 0 16 00 * *", "action":"ledoff"}'

See https://github.com/mongoose-os-libs/cron as a reference for the syntax of cron expressions on mgos.