This board is designed to be used in stand-alone remote controls and does not require a microcontroller. Each model comes with a unique ID key built in.
This sender requires a compatible self-learning receiver that can pick up the EV1527-compatible data package sent by the sender.
The board is equipped with a voltage regulator and accepts a wide range of input voltage from 3-24V.
Make sure you purchase the version for the frequency you intend to use. You cannot change the frequency later. In Europe, use the 433MHz version. The 315MHz version is intended for the US market. In Europe, 315MHz is reserved for military services, and you can get in serious trouble when you operate on this frequency.
What You Can (And Cannot)
This sender breakout board is special as it is ready-to-go to send four different RF signals that adhere to the EV1527 learning code format.
Indented Use Cases
This is what you can do with this board:
- Sending Predefined Data: you can use simple buttons or a microcontroller to send out one of the four predefined data codes (connect one of the signal inputs to GND) The codes that are sent are hard-coded inside the device.
- Receive Data: with a separate EV1527-compatible receiver, use its learning mode to teach it the codes emitted from the sender. Now the receiver responds to the emitted signals and can be used to control devices.
When To Not Use
And this is what you cannot do with this board:
- Send Own Data: you have no control over the data that is sent by this board. You cannot use it to send custom-formatted sensor data, i.e. to transmit readings from a weather station.
- Receive Data: receiving data emitted from this board is limited to receivers that can decode the EV1527 data format.
Use Cases
This sender is an excellent choice for remote-controlling devices.
For example, if you wanted to control electrical plugs to conventiently switch them on and off from your workbench, then this sender can do the job (controlling up to four plugs independently). If you need to control more devices, get more senders.
Wiring is extremely simple and no other external components are required (aside from an antenna). You do not need a separate microcontroller.
Just get enough receivers (one per device) that are EV1527-compatible. Or better yet, get yourself cheap 433MHz smart plugs or relay modules.
Do not use this board if you want to have control over the data you are sending, i.e. when you are looking for a solution that can transfer sensor data etc.
Specs
This breakout board by default emits 12.5mW and is slightly over the legal limit of 10mW in Europe.
| Item | Value |
|---|---|
| Voltage | 3-24V |
| Frequency | 433MHz or 315MHz |
| Output Power | 11dBm / 12.5mW |
| Standby Current | <3uA |
| Operating Current | 10mA |
| Modulation Mode | AM (OOK) |
| Transmission Rate | <10 Kbps |
| Size | 15x11.8mm |
Pins
The board comes with three pins plus a solder pad tp connect an antenna.
Always operate these devices with an antenna. If no designated antenna is at hand, use a plain 17.3cm wire for 433MHz, and a 23.8cm wire for 315MHz.
Pins are counted from the backside with the model number visible in the top left corner (as depicted):
The pin numbers are printed on the board next to the pin (on the back side of the board):
| Pin | Tag | Description |
|---|---|---|
| 1 | - | negative pole |
| 2 | + | +3-24V |
| 3 | 1 | Send code A (connect to GND) |
| 4 | 2 | Send code B (connect to GND) |
| 5 | 3 | Send code C (connect to GND) |
| 6 | 4 | Send code D (connect to GND) |
| 7 | ANT | Antenna |
LED
The board comes with a SMD LED found on the opposite side of the pins, at the right side.
This LED can indicate various states of the device.
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(content created Apr 01, 2024)