CN221202580U - CAN bus message collecting and forwarding device - Google Patents
CAN bus message collecting and forwarding device Download PDFInfo
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- CN221202580U CN221202580U CN202323111454.XU CN202323111454U CN221202580U CN 221202580 U CN221202580 U CN 221202580U CN 202323111454 U CN202323111454 U CN 202323111454U CN 221202580 U CN221202580 U CN 221202580U
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Abstract
The utility model discloses a CAN bus message collecting and forwarding device, which comprises a main control unit MCU, a 4G communication module and a CAN transceiver, wherein the main control unit MCU adopts an ESP32-S3 module, the ESP32-S3 module is connected with the CAN transceiver to collect bus signals, the CAN transceiver adopts an SN65HVD233D module, the 4G communication module adopts an EC800M module, the EC800M module is communicated with the main control unit MCU, and CAN message information is transmitted remotely and in real time. The CAN bus message collecting and forwarding device adopts a mode of combining short-distance wireless transmission (WIFI) and long-distance transmission (4G) to transmit CAN message information in real time, does not need to reserve a CAN bus interface and consider the matching of terminal resistance, and does not need to carry out harness connection to the site.
Description
Technical Field
The utility model relates to the technical field of wireless communication, in particular to a CAN bus message acquisition and forwarding device.
Background
In industries such as engineering machinery, industrial control and the like, electronic control systems need to be connected with more and more devices to meet various different requirements, and the aim is to enhance the safety, stability, accuracy and convenience of the system. In order to transfer data between a large number of devices and to reduce the number of wiring harnesses as much as possible, solutions for industrial buses such as CAN buses are straightforward. In the running process of the electronic system, the data message analysis of the CAN bus CAN play roles of monitoring data and diagnosing faults. With the vigorous development of wireless communication technology, terminal equipment supporting WIFI and 4G is mature, and the requirement of acquiring and analyzing vehicle-mounted and industrial CAN bus messages by adopting a wireless solution is also very strong.
At present, most technical research and development personnel in each industry acquire bus data by means of a CAN bus analyzer and analyze the data, and under the use scene, a plurality of defects exist, firstly, a CAN bus interface needs to be reserved, secondly, the matching of terminal resistance is considered, and most importantly, wire harness connection is needed to be carried out on site for use.
For example, CN202310932047.0 discloses a communication method and a communication system for a diagnostic program of a vehicle PDU and a PC, and uses a specific process of interaction between the PC and a PDU controller on the vehicle, wherein the connection mode of the CAN bus is a wired connection; patent number CN202310896607.1 discloses a control method of an automobile diagnostic apparatus with bluetooth communication, which adopts bluetooth as a wireless communication solution, and bluetooth has advantages in terms of low power consumption, but is inferior to WIFI communication in terms of transmission rate, transmission effective distance, etc.; WIFI and bluetooth both belong to close range transmission, and if functions such as remote monitoring of bus data are desired, it is also necessary to rely on 4G.
Disclosure of utility model
1. The technical problems to be solved are as follows:
Aiming at the technical problems, the utility model provides a CAN bus message acquisition and forwarding device.
2. The technical scheme is as follows:
The utility model provides a collection and retransmission device of CAN bus message, includes master control unit MCU, 4G communication module and CAN transceiver, master control unit MCU adopts ESP32-S3 module, and ESP32-S3 module connects the CAN transceiver and carries out bus signal acquisition, and the CAN transceiver adopts SN65HVD233D module, 4G communication module adopts EC800M module, and EC800M module communicates with master control unit MCU, long-range real-time transmission CAN message information.
Further, the ESP32-S3 module is integrated with a WIFI function module, and CAN message information is transmitted in a short-range and real-time manner through a local area network.
Further, the GPIO6 pin of the ESP32-S3 module is connected to the RXD pin of the SN65HVD233D module, and the GPIO7 pin of the ESP32-S3 module is connected to the TXD pin of the SN65HVD233D module.
Further, the GPIO15 pin of the ESP32-S3 module is connected with the REST_N pin of the EC800M module; the GPIO16 pin of the ESP32-S3 module is connected with the PWRKEY pin of the EC800M module; the GPIO19 pin of the ESP32-S3 module is connected with the USB_DM pin of the EC800M module; the GPIO20 pin of the ESP32-S3 module is connected with the USB_DP pin of the EC800M module; the GPIO39 pin of the ESP32-S3 module is connected with the MAIN_DTR pin of the EC800M module; the GPIO40 pin of the ESP32-S3 module is connected with the MAIN_RI pin of the EC800M module; the GPIO41 pin of the ESP32-S3 module is connected with the DEBUG_RXD pin of the EC800M module; the GPIO42 pin of the ESP32-S3 module is connected to the DEBUG_TXD pin of the EC800M module.
3. The beneficial effects are that:
The CAN bus message collecting and forwarding device adopts a mode of combining short-distance wireless transmission (WIFI) and long-distance transmission (4G) to transmit CAN message information in real time, does not need to reserve a CAN bus interface and consider the matching of terminal resistance, and does not need to carry out harness connection to the site. The main control unit and the 4G communication module are connected by adopting USB, the communication speed is obviously improved, the equipment in the WIFI local area network uploads data through a private protocol, and related contents can be monitored through the upper computer; and during remote transmission, the data is uploaded to the server through a result private protocol based on the 4G network, the function of equipment operation is remote configurable, and the equipment operation is compatible with various use scenes.
Drawings
FIG. 1 is a layout of the ESP32-S3 module of the present utility model;
FIG. 2 is a layout of a SN65HVD233D module of the present utility model;
FIG. 3 is a partial layout diagram of an EC800M module according to the present utility model;
FIG. 4 is a second layout diagram of a portion of an EC800M module according to the present utility model;
fig. 5 is a partial layout diagram III of an EC800M module according to the present utility model.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
As shown in figures 1 to 5 of the drawings,
Specific examples: the utility model provides a collection and retransmission device of CAN bus message, includes master control unit MCU, 4G communication module and CAN transceiver, master control unit MCU adopts ESP32-S3 module, and ESP32-S3 module connects the CAN transceiver and carries out bus signal acquisition, and the CAN transceiver adopts SN65HVD233D module, 4G communication module adopts EC800M module, and EC800M module communicates with master control unit MCU, long-range real-time transmission CAN message information. The EC800M module is purchased from a mobile telecommunications company, and the EC800M module is a module chip composed of a plurality of parts.
ESP32-S3 module integrates WIFI function module, and CAN message information is transmitted in short-range real-time through local area network
The GPIO6 pin of the ESP32-S3 module is connected to the RXD pin of the SN65HVD233D module, and the GPIO7 pin of the ESP32-S3 module is connected to the TXD pin of the SN65HVD233D module.
The GPIO15 pin of the ESP32-S3 module is connected with the REST_N pin of the EC800M module; the GPIO16 pin of the ESP32-S3 module is connected with the PWRKEY pin of the EC800M module; the GPIO19 pin of the ESP32-S3 module is connected with the USB_DM pin of the EC800M module; the GPIO20 pin of the ESP32-S3 module is connected with the USB_DP pin of the EC800M module; the GPIO39 pin of the ESP32-S3 module is connected with the MAIN_DTR pin of the EC800M module; the GPIO40 pin of the ESP32-S3 module is connected with the MAIN_RI pin of the EC800M module; the GPIO41 pin of the ESP32-S3 module is connected with the DEBUG_RXD pin of the EC800M module; the GPIO42 pin of the ESP32-S3 module is connected to the DEBUG_TXD pin of the EC800M module.
The working principle of the CAN bus message collecting and forwarding device is as follows: the main control unit MCU (ESP 32-S3) is connected with the CAN transceiver (SN 65HVD 233D) for collecting bus signals; the 4G communication module adopts a remote EC800M module, the MAIN control unit MCU controls the power supply of the module by changing the PWR pin state of the EC800M module, the EC800M module is started to work after the EPK pin provides a time sequence, the EC800M module has some state signals which are fed back to the MAIN control unit through DTR, RI, 4GSTATUS and other pins, the MAIN control unit and the EC800M module are in data interaction in three modes of USB, USART_MAIN and USART_DEBUG, wherein the USB and the USART_MAIN both support standard AT instruction operation and PPP mode data transmission, and the USART_DEBUG can output GPS positioning data of a standard NEMA protocol AT fixed frequency after being configured by using an AT instruction.
While the utility model has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model, and it is intended that the scope of the utility model shall be defined by the appended claims.
Claims (4)
1. The device for collecting and forwarding the CAN bus message is characterized by comprising a main control unit MCU, a 4G communication module and a CAN transceiver, wherein the main control unit MCU adopts an ESP32-S3 module, the ESP32-S3 module is connected with the CAN transceiver to collect bus signals, the CAN transceiver adopts an SN65HVD233D module, the 4G communication module adopts an EC800M module, the EC800M module is communicated with the main control unit MCU, and CAN message information is transmitted remotely and in real time.
2. The collecting and forwarding device of CAN bus messages according to claim 1, wherein the ESP32-S3 module is integrated with a WIFI function module, and CAN message information is transmitted in short-range real-time through a local area network.
3. The collecting and forwarding device of CAN bus messages according to claim 2, wherein the GPIO6 pin of the ESP32-S3 module is connected to the RXD pin of the SN65HVD233D module, and the GPIO7 pin of the ESP32-S3 module is connected to the TXD pin of the SN65HVD233D module.
4. A collecting and forwarding device for CAN bus messages according to claim 3, wherein the GPIO15 pin of the ESP32-S3 module is connected to the rest_n pin of the EC800M module; the GPIO16 pin of the ESP32-S3 module is connected with the PWRKEY pin of the EC800M module; the GPIO19 pin of the ESP32-S3 module is connected with the USB_DM pin of the EC800M module; the GPIO20 pin of the ESP32-S3 module is connected with the USB_DP pin of the EC800M module; the GPIO39 pin of the ESP32-S3 module is connected with the MAIN_DTR pin of the EC800M module; the GPIO40 pin of the ESP32-S3 module is connected with the MAIN_RI pin of the EC800M module; the GPIO41 pin of the ESP32-S3 module is connected with the DEBUG_RXD pin of the EC800M module; the GPIO42 pin of the ESP32-S3 module is connected to the DEBUG_TXD pin of the EC800M module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323111454.XU CN221202580U (en) | 2023-11-17 | 2023-11-17 | CAN bus message collecting and forwarding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323111454.XU CN221202580U (en) | 2023-11-17 | 2023-11-17 | CAN bus message collecting and forwarding device |
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| Publication Number | Publication Date |
|---|---|
| CN221202580U true CN221202580U (en) | 2024-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202323111454.XU Active CN221202580U (en) | 2023-11-17 | 2023-11-17 | CAN bus message collecting and forwarding device |
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| Country | Link |
|---|---|
| CN (1) | CN221202580U (en) |
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- 2023-11-17 CN CN202323111454.XU patent/CN221202580U/en active Active
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