This module is a module that converts a TTL signal into a CAN signal. The serial port is used as the interface of the embedded system, the data transmission is simple, there is no need to learn the CAN protocol, the development cycle is shortened, and the development cost is reduced. The module is compatible with 3.3V, 5V power supply, and the small area is semi-hole technology, which is easier to embed in the system.
The module is equipped with a 32-bit ARM processor and a CAN level shifting chip. 14 sets of masking filters, each with five frame filtering methods. The parameter is set to the AT command setting mode, the command is simple and concise, and there are only 6 instructions. A wider baud rate range is more adaptable to the network.
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The ARM processor with Cortex M3 core has stronger data processing capability and lower power consumption. The processor integrates the CAN controller to make the transmission more time-saving. 5V, 3.3V power supply, LDO linear regulator
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CAN baud rate range: 3Kbps--1Mbps fully supports CAN bus 2.0A and 2.0B specifications
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Serial port baud rate range: 4800bps-- 460800bps sampling point is automatically adjusted to or close to CIA value
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Offline self-recovery
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14 sets of 32-bit shielding filters, free to choose, arbitrarily set
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The parameter can be set by AT command and saved after power down.
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Data transfer speed: > 600 frames per second
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Hardware and software restore default parameters
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The message data length 0-8 bytes can be arbitrarily set.
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With surge protection circuit to suppress transient interference and protect internal circuits
Instructions for Use:
The serial port of this module is TTL 3.3V signal, which cannot be connected with 232 signal! If you want to interface with a 5V system, it is best to have a 5V to 3.3V circuit.
The module has a status indicator that is 1 Hz when in communication mode and 5 Hz when in configuration mode.
Pin Description：
5V: Connect 5V power supply
3.3V: Connect to 3.3V power supply
GND: power ground
CFG: Configuration pin, 0 is the configuration mode, 1 is the working mode.
TXD: Connect the RXD pin of the target board
RXD: Connect the TXD pin of the target board
CANL: CANL signal line connected to CAN network
CANH: CANH signal line connecting CAN network
Restore default parameter function method
Method 1:
First pull the CFG pin of the module low, and then pull down the module's indicator light to flash at 5Hz. Then open the parameter setting software, configure the baud rate of the serial port, and then click the button to read the parameters successfully, then click the button. When all parameters are read again, the parameters will all be restored to the values in the above table. The serial port baud rate is 115200 at the factory. If it has been changed and is forgotten, it can only be recovered by Method 2.
Method 2:
This method can only be used if Method 1 fails. Power off first, short the RT interface on the module (as shown below), and then power on again. The RT interface cannot be shorted all the time. Otherwise, the parameters will be restored to the default values each time the power is turned on.
On Nov 21, 2023 at 02:19:31 PST, seller added the following information:
