RTL873xBU
RTL8731BU and RTL8733BU are very small WiFi chips, so network cards based on them are really compact. Because of that they are extremely popular for tinywhoop builds.
Important
RTL873xBU-based net cards AREN'T SUITABLE FOR LONG RANGE AND RX USE.
Supported modes: 5 MHz, 10 MHz, 20 MHz, 40 MHz.
Note on 40 MHz mode
40 MHz mode is supported by the driver, but your specific card might not support this mode. Please contact the seller before buying.
If you don't receive an image after switching to 40 MHz mode, please read the relevant troubleshooting article.
BL-M8731BU3
BL-M8731BU3 is one of the most common modules based on the RTL8731BU chip. Its microscopic size makes it ideal for minimalist FPV builds.
Pinout
| Pin | Function |
|---|---|
| 1 | GND |
| 2 | NC |
| 3 | VDD 3.3V |
| 4 | DM− |
| 5 | DP+ |
| 6 | GND |
Warning
The module operates at 3.3V! Applying 5V may damage it.
Specifications
| Parameter | Value |
|---|---|
| Host interface | USB 2.0 |
| Power supply | DC 3.3V |
| Antenna | IPEX connector |
| Power output | ≤ 17 dBm (≤ 50 mW) @ 5G / ≤ 21 dBm (≤ 125 mW) @ 2.4G |
| Supported modes | 5 MHz, 10 MHz, 20 MHz, 40 MHz |