DescriptionBack to top
• Frequency: 315Mhz
• Modulation: ASK
• Transmitter input voltage: 3-12V
• Includes transmitter and receiver
This is the Seeedstudio 315MHz RF Low Cost Transmitter/Receiver Pair. This kit is consisted of transmitter and receiver, popularly used for remote control.
The popular link is like this: MCU -> Encoder -> Transmitter ------ Receiver -> Decoder -> MCU.
The PT2262 (Encoder) and PT2272 (Decoder) are optional, their existence is to (1) avoid confusing when multiple RF links in range (2) isolate disturbance. You can integrate the encoding and decoding work to the MCUs on both sides. Whenever there is no 315Mhz devices around, you may use it as direct cable connection.
At 9 VDC input the communication range is approximately 300 m to 500 m in open air.
SpecificationsBack to top
• Modulation: ASK
• Receiver Data Output: High - 1/2 Vcc, Low - 0.7v
• Transmitter Input Voltage: 3-12V (high voltage = more transmitting power) Back to top
Write Your Own Review
Fun, yet cheap, wireless transmitter/receiver pair!Review by Stephen
I use this 315MHz transmitter/receiver pair almost daily in my wireless transmission experiments. The 315MHz pair worked without issue right out of the package! With the success in experimenting with this 315MHz pair, my plan is to order additional 315MHz pairs [RB-See-11] as well as the 433MHz pair [RB-See-12].
Experiments with the 315MHz pair included wireless communication testing using the following scenario:
LDR sensor -> PICAXE 20M2 -> 315MHz Transmitter ---------> 315MHz Receiver -> FTDI FT232RL Breakout -> USB port -> Laptop
At 5v power supplied on both transmitter and receiver ends, my experiments were able to transmit/receive data packets at close to 20m (indoors with walls, doors, stairs, etc in between) with 98% to 99.9% packets received. First experiments positioned the transmitter and receiver approx 1 meter apart. Other experiments reached up to 17-20 meters apart. Now, I'm using the Pololu S8V3A Step-Up/Step-Down Voltage Regulator [RB-Pol-113] with the transmitter (transmitter can operate up to 12v) and receiving transmissions from a utility house out back all the way to the office at almost 60 meters away!
To connect the 315MHz receiver [RB-See-11] to the FTDI Breakout [RB-Spa-541], I simply attached the +5v, GND, and <inverted> TX0 pin to the correct pins of the receiver and ran PuTTY on my laptop connecting to the specified COM port using 1200 baud rate, 8 bits, 1 stop bit, no parity & no flow control. I immediately saw data picked up by the 315MHz receiver (a LOT of RF NOISE and transmissions around this area!). Once I had the 315MHz transmitter module connected to a PICAXE 20M2 [RB-Pic-31], and code executing a series of SEROUT commands at N1200 baud rate (including preamble, data, counter and checksum), I saw my transmissions picked up by the receiver/PuTTY out of the noise!!!
The only real complaint is the receiver comes with a helical antenna soldered in place; I'd rather have a pin to the breadboard so I can choose the type and shape of the antenna I want to use at both ends.
(Posted on 6/30/15)