Remove dup library in mos.yml; cast 'value' to bool in Relay.Set()

Simply add the entire mosquitto message as a JSON entity, not a string.
The simple case now looks like:
      "mqtt": [ {"topic": "/s/cmnd/5C:CF:7F:20:29:6E/Power", "message": "On"} ]

Sending an RPC to Mongoose OS looks like:
      "mqtt": [ {"topic": "esp32_XXXXXX/rpc/Button.Touch", "message": {"args": {"idx":0}}} ]

fs/screen_one.json

@@ -19,7 +19,7 @@
       "h": 56,
       "label": "On",
       "type": 1,
-      "mqtt": [ "/s/cmnd/5C:CF:7F:20:29:6E/Power On" ]
+      "mqtt": [ {"topic": "/s/cmnd/5C:CF:7F:20:29:6E/Power", "message": "On"} ]
     },
     {
       "name": "heli_led_off",
@@ -29,7 +29,7 @@
       "h": 56,
       "label": "Off",
       "type": 1,
-      "mqtt": [ "/s/cmnd/5C:CF:7F:20:29:6E/Power Off" ]
+      "mqtt": [ {"topic": "/s/cmnd/5C:CF:7F:20:29:6E/Power", "message": "Off"} ]
     },
     {
       "name": "heli_led_toggle",
@@ -39,7 +39,7 @@
       "h": 56,
       "label": "Toggle",
       "type": 1,
-      "mqtt": [ "/s/cmnd/5C:CF:7F:20:29:6E/Power Toggle" ]
+      "mqtt": [ {"topic": "/s/cmnd/5C:CF:7F:20:29:6E/Power", "message": "Toggle"} ]
     }
   ]
 }

fs/screen_two.json

@@ -18,7 +18,8 @@
       "w": 48,
       "h": 48,
       "label": "Two",
-      "type": 0
+      "type": 1,
+      "mqtt": [ {"topic": "esp32_XXXXXX/rpc/Button.Touch", "message": {"args": {"idx":0}}} ]
     }
   ]
 }

mos.yml

@@ -99,7 +99,6 @@ libs:
   - origin: https://github.com/mongoose-os-libs/rpc-service-fs
   - origin: https://github.com/mongoose-os-libs/prometheus-metrics
   - origin: https://github.com/mongoose-os-libs/rpc-common
-  - origin: https://github.com/mongoose-os-libs/rpc-service-config
   - origin: https://github.com/mongoose-os-libs/rpc-mqtt
   - origin: https://github.com/mongoose-os-libs/mqtt
   - origin: https://github.com/mongoose-os-libs/pwm

src/buttons.c

@@ -49,7 +49,7 @@ int buttons_init(const char *flag) {
     s_buttons[next_button].gpio=gpio;
     s_buttons[next_button].last_change=-1;
     mgos_gpio_set_mode(gpio, MGOS_GPIO_MODE_INPUT);
-    mgos_gpio_set_button_handler(gpio, MGOS_GPIO_PULL_UP, MGOS_GPIO_INT_EDGE_NEG, 100, buttons_cb, NULL);
+    mgos_gpio_set_button_handler(gpio, MGOS_GPIO_PULL_NONE, MGOS_GPIO_INT_EDGE_POS, 300, buttons_cb, NULL);
 
     next_button++;
     if (next_button>MAX_BUTTONS) {

src/rpc.c

@@ -90,7 +90,7 @@ static void rpc_relay_set_handler(struct mg_rpc_request_info *ri, void *cb_arg,
     return;
   }
 
-  relays_set_by_idx(idx, state);
+  relays_set_by_idx(idx, (bool) state);
   mg_rpc_send_responsef(ri, "{idx: %d, gpio: %d, state: %d}", idx, gpio, state);
 
   (void) cb_arg;

src/widget_default.c

@@ -124,30 +124,23 @@ static void widget_default_mqtt_send(struct widget_t *w, void *ev_data) {
 //  LOG(LL_DEBUG, ("MQTT string: '%s'", (char *)w->user_data));
   // Traverse Array
   for (idx = 0; json_scanf_array_elem(w->user_data, strlen(w->user_data), "", idx, &val) > 0; idx++) {
-    char *t=NULL, *m=NULL;
-    uint16_t t_len=0, m_len=0;
-    char *topic;
+    char *topic, *message;
 
     LOG(LL_DEBUG, ("Index %d, token [%.*s]", idx, val.len, val.ptr));
-    t=(char*)val.ptr;
-    m=strstr(val.ptr, " ");
-    if (m-val.ptr <= val.len) {
-      t_len=m-t;
-      m++;
-      m_len=val.len-t_len-1;
-    } else {
-      t_len=val.len;
-      m_len=0;
-      m=NULL;
+    if (val.len==0) {
+      LOG(LL_ERROR, ("mqtt element %d is empty token", idx));
+      continue;
     }
-    if ((topic=malloc(t_len+1))) {
-      memcpy(topic, t, t_len);
-      topic[t_len]=0;
-      LOG(LL_INFO, ("Sending topic='%s', message='%.*s'", topic, m_len, m));
-      mgos_mqtt_pub(topic, m, m_len, 0, false);
-      free(topic);
+    if (json_scanf(val.ptr, val.len, "{topic:%Q, message:%Q}", &topic, &message) != 2) {
+      LOG(LL_ERROR, ("mqtt element %d ('%.*s'), required fields 'topic' and 'message'", idx, val.len, val.ptr));
+      continue;
+    }
+    LOG(LL_INFO, ("Sending topic='%s', message='%s'", topic, message));
+    mgos_mqtt_pub(topic, message, strlen(message), 0, false);
     widget_network_send();
-    }
+
+    if (topic) free(topic);
+    if (message) free(message);
   }
   (void) ev_data;
 }