| Price | $7 |
|---|---|
| Category | Communication Modules |
| Availability | In stock |
| Delivery | Shipped across Lebanon, or collect from the lab |
A two-way wireless serial bridge on the 434 MHz band: pair two HC-11s and whatever one module's RXD pin swallows comes out of the other's TXD. Unlike a cheap one-way 433 MHz pair it is addressable, has selectable channels and four transmission modes, and keeps its settings through a power cut. It runs on 3.3-5V and talks TTL, so 3V and 5V boards connect without a level shifter. Spring antenna supplied; there is a u.FL pad too.
Key features
- 434 MHz two-way serial link, half duplex
- 3.3-5V supply, TTL levels for 3V and 5V boards
- Transmit power set by AT command, -30 to +10 dBm
- Idle current 80 uA (FU2) up to 22 mA (FU3/FU4)
- Channel and module address let several pairs coexist
- Settings survive power-off; default 9600 baud
Details
Specifications
| Model | HC-11 |
|---|---|
| Band | 434 MHz |
| Type | Half-duplex serial transceiver (full duplex in FU3 mode) |
| Operating voltage | 3.3-5V |
| Logic voltage | TTL - works with 3V and 5V microcontrollers |
| Interface | UART (TTL serial) plus a CON pin for setup mode |
| Baud rates | 1200-115200 bps, default 9600 |
| Transmit power | -30 to +10 dBm, default +10 dBm (10 mW) |
| Idle current | 80 uA (FU2), 3.5 mA (FU1), 22 mA (FU3/FU4) |
| Peak current | 35 mA |
| Channels | 001-127; the datasheet says about 20 (001-020) are usable |
| Antenna | Spring antenna supplied; u.FL pad (ANT1) and solder pad (ANT2) |
