Ed Gross

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8 years ago.

GR-PEACH BP3595 WiFi Sniffer

We'd like to use the GR-PEACH along with the ROHM BP3595 WiFi module to build a WiFi sniffer that will gives us all the MAC addresses in range, along with their RSSI.

I don't see any supported libraries that do this, and I've not even been able to even find a programming manual for the ROHM module. We can use any WiFI device, a USB device would work fine if it had a supported mbed library.

Any pointers or ideas are appreciated. We're on a short fuse, thus the need to find something that's already mostly supported.

Ed

1 Answer

Daiki Kato
8 years ago.

When the "scan()" function added in mbed OS 5.2 is used, the following information can be acquired. BSSID will be usually the same one as the MAC address.

  • SSID
  • BSSID
  • Security
  • RSSI
  • Channel

Sample program
You can try with the following program.

[Repository '/teams/Renesas/code/GR-PEACH_WebCamera/' not found]


Using WiFi BP3595 (Set to "NETWORK_TYPE=1" and "SCAN_NETWORK=1")
https://developer.mbed.org/teams/Renesas/code/GR-PEACH_WebCamera/wiki/Homepage#using-wifi-bp3595

Relevant parts excerpt

main.cpp (relevant parts excerpt)

static void scan_network(void) {
    int num;
    int i;
    int select_no;
    bool loop_break;
    char ch;
    char pass[64];
    const uint8_t *wk_p;
    WiFiAccessPoint point[8];
 
    while (1) {
        printf("scan...\n");
        num = network.scan(point, 8);
        for (i = 0; i < num; i++) {
            printf(" No.%d\n", i);
            printf("   ssid    :%s\n", point[i].get_ssid());
            wk_p = point[i].get_bssid();
            printf("   bssid   :0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x\n",
                    wk_p[0],wk_p[1],wk_p[2],wk_p[3],wk_p[4],wk_p[5]);
            printf("   security:");
            switch (point[i].get_security()) {
                case NSAPI_SECURITY_NONE:
                    printf("NONE\n");
                    break;
                case NSAPI_SECURITY_WPA:
                    printf("WPA\n");
                    break;
                case NSAPI_SECURITY_WPA2:
                    printf("WPA2\n");
                    break;
                case NSAPI_SECURITY_WPA_WPA2:
                    printf("WPA_WPA2\n");
                    break;
                case NSAPI_SECURITY_UNKNOWN:
                default:
                    printf("UNKNOWN\n");
                    break;
            }
            printf("   rssi    :%d\n", point[i].get_rssi());
            printf("   channel :%d\n", point[i].get_channel());
        }

...omit...

    }
}
#endif


Reference information
Software development specs of BP3595 Japanese
https://developer.mbed.org/teams/Rohm/wiki/Datasheet