Initial commit

src/widget_wifi.c

@@ -0,0 +1,65 @@
+#include "mgos.h"
+#include "tft.h"
+#include "widget.h"
+#include <esp_wifi.h>
+
+static long map(long x, long in_min, long in_max, long out_min, long out_max)
+{
+  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
+}
+
+// Returns a value between 0 and 100%
+static uint8_t widget_wifi_signal() {
+  wifi_ap_record_t info;
+
+  if(0 != esp_wifi_sta_get_ap_info(&info))
+    return 0;
+
+  if(info.rssi <= -100)
+    return 0;
+  if (info.rssi >= -50)
+    return 100;
+  return 2 * (info.rssi + 100);
+}
+
+static void widget_wifi_render(struct widget_t *w, void *ev_data) {
+  uint8_t x, signal;
+
+  mgos_ili9341_setclipwin(w->x, w->y, w->x+w->w, w->y+w->h);
+
+  mgos_ili9341_fillTriangle(2, 18, 18, 18, 18, 2, ILI9341_DARKGREY);
+
+  // Map signal strength from [0..100] to [0..16]
+  signal = widget_wifi_signal();
+  x = map(signal, 0, 100, 0, 16);
+  if (x>0)
+    mgos_ili9341_fillTriangle(2, 18, 2+x, 18, 2+x, 18-x, ILI9341_WHITE);
+
+  // Draw an X in the corner if we don't have an IP address.
+  if (mgos_wifi_get_status() != MGOS_WIFI_IP_ACQUIRED) {
+    mgos_ili9341_drawLine(11, 11, 16, 16, ILI9341_RED);
+    mgos_ili9341_drawLine(11, 16, 16, 11, ILI9341_RED);
+  }
+  mgos_ili9341_resetclipwin();
+
+  (void) ev_data;
+}
+
+void widget_wifi_ev(int ev, struct widget_t *w, void *ev_data) {
+  if (!w)
+    return;
+
+  switch(ev) {
+    case EV_WIDGET_CREATE:
+    case EV_WIDGET_DRAW:
+    case EV_WIDGET_REDRAW:
+    case EV_WIDGET_TIMER:
+      widget_wifi_render(w, ev_data);
+      break;
+    case EV_WIDGET_TOUCH_UP:
+    case EV_WIDGET_TOUCH_DOWN:
+    case EV_WIDGET_DESTROY:
+    default: // EV_WIDGET_NONE
+      break;
+  }
+}