Earle F. Philhower, III
d718b143d2
Let GCC check the format string to Print::printf(). Will catch when sketches use incorrect parameters to `Serial::printf()`.
43 lines
1.2 KiB
Arduino
43 lines
1.2 KiB
Arduino
// Simple WiFi network scanner application
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// Released to the public domain in 2022 by Earle F. Philhower, III
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#include <WiFi.h>
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void setup() {
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Serial.begin(115200);
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}
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const char *macToString(uint8_t mac[6]) {
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static char s[20];
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sprintf(s, "%02X:%02X:%02X:%02X:%02X:%02X", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
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return s;
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}
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const char *encToString(uint8_t enc) {
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switch (enc) {
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case ENC_TYPE_NONE: return "NONE";
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case ENC_TYPE_TKIP: return "WPA";
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case ENC_TYPE_CCMP: return "WPA2";
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case ENC_TYPE_AUTO: return "AUTO";
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}
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return "UNKN";
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}
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void loop() {
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delay(5000);
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Serial.printf("Beginning scan at %lu\n", millis());
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auto cnt = WiFi.scanNetworks();
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if (!cnt) {
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Serial.printf("No networks found\n");
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} else {
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Serial.printf("Found %d networks\n\n", cnt);
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Serial.printf("%32s %5s %17s %2s %4s\n", "SSID", "ENC", "BSSID ", "CH", "RSSI");
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for (auto i = 0; i < cnt; i++) {
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uint8_t bssid[6];
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WiFi.BSSID(i, bssid);
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Serial.printf("%32s %5s %17s %2d %4ld\n", WiFi.SSID(i), encToString(WiFi.encryptionType(i)), macToString(bssid), WiFi.channel(i), WiFi.RSSI(i));
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}
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}
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Serial.printf("\n--- Sleeping ---\n\n\n");
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delay(5000);
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}
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