EnOcean click

EnOcean click carries a TCM 310 transceiver, which is a bidirectional gateway for EnOcean’s 868 MHz radio systems. The click is designed to run on a 3.3V power supply. It communicates with the target MCU through UART (TX, RX pins), with additional functionality provided by RST and EN pins.

Note: Modules with 868 MHz frequency are suitable for Europe and other countries adopting R&TTE specification. Versions of EnOcean click covering different frequency bands will be available in the future.

TCM 310 transceiver

This low-powered wireless module is intended for use together with EnOcean’s range of energy harvesting modules that include self-powered, battery-free wireless switches, sensors and actuators.

Essential features

EnOcean offers a range of modules compatible with TCM 310. Those are miniaturized energy converters that use the surrounding environment — motion, light or temperature differences — to harness enough energy to send a wireless signal to the receiver onboard EnOcean click.

The TCM 310 module can also be set up as a repeater to extend the range of the signal. You can then develop various battery-free switching systems, data loggers and similar.

Onboard antenna

EnOcean click features a small high-performance 868MHz chip antenna onboard so no external antennas are required.

Key features

• TCM 310 transceiver
  • Frequency: 868 MHz EnOcean
  • Data rate: 125 kbps
• Onboard antenna
• Interface: UART
• 3.3V power supply

Specification

Pinout diagram

This table shows how the pinout on EnOcean click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin	mikroBUStm				Pin	Notes
Not connected	NC	1	AN	PWM	16	EN	In read mode, the firmware version and configuration area can be read from the module
Reset input	RST	2	RST	INT	15	NC	Not connected
Not connected	NC	3	CS	TX	14	SER_TX	UART output
Not connected	NC	4	SCK	RX	13	SER_RX	UART input
Not connected	NC	5	MISO	SCL	12	NC	Not connected
Not connected	NC	6	MOSI	SDA	11	NC	Not connected
Power supply	+3.3V	7	3.3V	5V	10	NC	Not connected
Ground	GND	8	GND	GND	9	GND	Ground

Programming

The function sends ESP3 packet header and data over UART interface to an EnOcean module.

01 uint8_t sendMessage(ESP3Pack* esp){
02 
03 uint8_t i=0;
04 
05 if((esp->header.dataLength || esp->header.oppDataLength) == 0)
06 {
07 return -1;
08 }
09 
10 UART2_Write(esp->syncByte);
11 UART2_Write((esp->header.dataLength & 0xFF00)>>8);
12 UART2_Write((esp->header.dataLength & 0xFF));
13 UART2_Write(esp->header.oppDataLength);
14 UART2_Write(esp->header.packetType);
15 UART2_Write(esp->headerCRC);
16 
17 for(i=0; i < esp->header.dataLength; i++)
18 UART2_Write(esp->dataESP3[i]);
19 for(i=0; i < esp->header.oppDataLength; i++)
20 UART2_Write(esp->optData[i]);
21 
22 UART2_Write(esp->dataCRC);
23 
24 return 0;
25 }