Hardware » CANBridge

h1. Eval

h2. Funk

Ordered RFM69CW-868S2 x8; je 3.70Euro

https://www.hoperf.com/modules/rf_transceiver/RFM69C.html
https://www.hoperf.com/data/upload/portal/20190307/RFM69CW-V1.1.pdf
2x7 pins, 2mm pitch, 13,6mm horizontal pitch

Packet mode is already recommended.
With AES there are still max 64 Bytes for transfer. (Not enough for CAN-FD)

868MHz

h2. MCU

STM32F373C8T6; 4,75€
Cortex-M4 etwas overkill; 64 KB, LQFP-48
Gibt gerade nichts anderes.

STM32G441KBT6; 5,45€
Cortex-M4F etwas overkill; 128 KB, LQFP-32

STM32F072C8T6; 4,38€
Cortex-M0; 64KB, LQFP-48

STM32F042C6T6; would be perfect; 2.5984€ bei 25 Stk; schoen waers

Small as possible with CAN. STM32F042 not available.
What did i get from farnell? STM32F103? STM32L433CCU6; ARM Cortex-M4, 80MHz, 256KB

* SPI 4
* 5xGPIO Signals
* CAN 2
* 2xLED RX/TX
* 2xLED HB/User
* UART 2
* SWD 3
---------
20

STM32F103C6U6A, would be ok, just to get rid of them
32kByte Flash; 10kByte RAM; 72Mhz; VFQFPN-48
Quite big.

h2. Antenna

* 868M-ANT410
* RF2-19A-T-00-50-G

h2. Messungen

Nucleo:
* Receive: 60-85mA
* Send: 171