Self-Powered Wireless Switch 433Mhz

This wireless switch from DFRobot needs no battery: a small generator converts the energy of the button press into electricity and uses it to send a 433 MHz signal in EV1527 format. It is received, for example, with the Gravity wireless receiver 433 MHz, which switches up to four outputs, or with other receivers for EV1527 at 10 kbit/s. One of 15 codes is selected with the DIP switch.

Important: In Switzerland, a maximum of 10 mW ERP is permitted in the range 433.05 to 434.79 MHz. DFRobot specifies an output power of 13 dBm (about 20 mW) for the switch, it cannot be adjusted; DFRobot does not state how much of it the wire antenna radiates.

Caution: Do not press more than 3 times per second, otherwise energy builds up and the chip can burn out. At least one DIP switch must be up. Do not press the button while DC voltage is connected (DFRobot).

Recommended Accessories:

• Gravity Digital Wireless Receive Switch 433MHz Receiver

Features:

• No battery, maintenance-free
• Encoding EV1527, 10 kbit/s, modulation OOK
• 4-way DIP switch for 15 states (D0 to D3), 1 million random address codes
• Service life 100000 presses
• Input for 3.3 to 5 V DC, so the switch also transmits without pressing, for example for pairing
• Range according to DFRobot 40 m indoors, with the wire antenna stretched

Application Examples:

• Wireless doorbell
• Call button or order button
• Wall switch without cable
• Push button in places without power

Documentation:

• Wiki DFRobot TEL0146 with pairing guide
• Schematic (PDF)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: TEL0146
• Chip: CMT2156
• Frequency: 433 MHz
• Modulation: OOK
• Encoding: EV1527
• Data rate: 10 kbit/s
• Output power: 13 dBm
• Generated energy: 600 µJ per press
• Actuation force: typically 1800 g
• Travel: 2.6 mm, springs back by itself
• Press rate: max. 3 times per second (wiki; product page states 4)
• Range: 40 m indoors
• Dimensions: 47 × 25 × 11 mm

Scope of Delivery:

• 1× Self-Powered Wireless Switch 433 MHz