Ebyte E48-433/900T20S User Manual
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Ebyte E48-433/900T20S User Manual

Ebyte E48-433/900T20S User Manual

433/900 mhz smd wireless module
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E48-433/900T20S User Manual
433/900 MHz SMD wireless module

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Summary of Contents for Ebyte E48-433/900T20S

  • Page 1 E48-433/900T20S User Manual 433/900 MHz SMD wireless module...

  • Page 2: Table Of Contents

    RELATIONSHIP BETWEEN CYCLE CLASSIFICATION AND AIR DATA RATE 8. AT COMMAND ..................................18 8.1 AT ..................................... 19 COMMAND LIST 8.2 AT ................................. 21 PARAMETER ANALYSIS 8.3 P ..............................21 RECAUTIONS FOR UPGRADE Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.
  • Page 3 EFLOW SOLDERING CURVE 13. RELATED MODELS ................................ 27 14. ANTENNA GUIDE ................................27 14.1 A ..............................27 NTENNA RECOMMENDATIONS 15. BATCH PACKAGING METHODS ..........................29 REVISE HISTORY ..................................29 ABOUT US ....................................29 Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 4: Disclaimer And Copyright Notice

    Due to product version upgrades or other reasons, the contents of this manual may be changed. Ebyte Electronic Technology Co., Ltd. reserves the right to modify the contents of this manual without any hint or notice. This manual is only used as a guide. Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 5: Overview

    1.Overview 1.1 Introduction E48-433T20S and E48-900T20S are a cost-effective wireless data transmission module launched by Chengdu Ebyte. It has 4 working modes. It has a variety of transmission methods and can be applied to a variety of application scenarios. E48-433T20S and E48-900T20S support a maximum transmit power of 20dBm. The module works in the 433MHz/900MHz frequency band, TTL level output, and is compatible with 3.3V IO port voltage.

  • Page 6: Application Scenarios

    Wearable devices;  Smart home and industrial sensors, etc.;  Security systems, positioning systems;  Wireless remote control, drone;  Wireless game remote;  Healthcare products;  Automotive industry applications.  Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 7: Specifications

    5V TTL Emission Instantaneous power consumption , current @ 5V power supply @ 5V power supply receive current Sleep current Software shutdown Operating Industrial grade ℃ -40 ~ +85 temperature Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 8: Hardware Parameters

    SMD type, stamp hole, pin spacing 1.27mm method Antenna IPEX / Stamp Hole interface 3. Dimensions and pin definitions Note: The pin definitions of E48-433T20S and E48-900T20S are the same. Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.
  • Page 9 Module power supply positive reference, voltage range: 2.7V~5.5V DC Module ground wire Input Reset pin, active in low level Module ground wire Module ground wire Module ground wire Antenna Module ground wire Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 10: Recommended Connection Diagram

    Some 5V microcontrollers may need to add 4~10K pull-up resistors to the TXD and AUX pins of the module. If the RST pin is not used, the RST pin can be left floating Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 11: Function Detailed Explanation

    After the module receives valid wireless data, it will immediately pull AUX low and start the serial port to output data. After the data output is completed, it will pull AUX high again. Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 12: Wireless Transmission Instructions

    When switching modes , the module will perform a self-test of about 145ms. It is recommended that users wait for more than 145ms after performing reset and switching modes before performing other operations. Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 13: Aux Precautions

    When the user enters other modes from mode 3 (sleep mode) or during the reset process, the module will reset the user parameters, during which the AUX output is low level. 5.3.6 Detailed explanation of fixed-point transmission Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 14: Broadcast Transmission

    Example: Set the module A address to 0xFFFF and the channel to 0x04.  When module A is used as a receiver, it can receive all data under the 0x04 channel to achieve the purpose of monitoring.  Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 15: Working Mode

    This operation method is very flexible and efficient. It is completely designed according to the user's MCU operation  convenience and can reduce the workload of the entire system as much as possible, improve system efficiency and reduce power consumption. Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 16: Normal Mode (Mode 0)

    When entering other modes from the setting mode, the module will reconfigure the parameters. During the configuration process, AUX remains low; Notice After completion, it outputs high level, so it is recommended that the user detects the rising edge of AUX. Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 17: Sleep Mode (Mode 3)

    (2.4K). Send: C2 00 04 12 34 00 62 Return: C1 00 04 12 34 00 62 Command: CF CF + normal command wireless Respond：CF CF + normal respond configuration Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 18: Parameter Setting Instructions

    Air data rate 2.4K (default) The higher the air data rate is, the smaller the Air data rate 4.8K delay in response, and the shorter the transmission Air data rate 9.6k distance is. Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.
  • Page 19 RSSI strength byte. Obtain REG3 the value as the complement of an 8-bit signed rite number. For example, if the value is 0x80, the Enable actual value is -128. Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.
  • Page 20 The module will use these two bytes internally as CRYPT 09H​ write Key low byte (default 0) calculation factors to transform and encrypt the air wireless signal. 80H～86H read Product information 7 bytes Product information 7 bytes Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 21: Factory Default Parameters

    Users can query the AT commands supported by the module through "AT+HELP=?". The baud rate used by the AT command is 9600 8N1; When the input parameters exceed the range, they will be restricted. Please do not let the parameters exceed the range to avoid unknown situations. Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 22: At Command List

    Set the network ID to 1234 AT+NETID=netid AT+NETID=1234 Set module key Set the module key to 2345 AT+KEY=key AT+KEY=2345 Setting software mode Setting software switching AT+SWITCH=switch AT+SWITCH=1 switch mode function enabled Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.
  • Page 23 Return module network ID AT+NETID=? AT+NETID=1234 1234 Query module key Return module key 2345 AT+KEY=? AT+KEY=2345 Query software switching Return software switching AT+SWITCH=? AT+SWITCH=1 mode function switch mode function enabled Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 24: At Parameter Analysis

    If you need to exit the IAP upgrade mode, you need to keep power on and wait for 60 seconds. The program will automatically exit. Otherwise, even if you restart the device, it will enter unlimited upgrade mode. Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 25: Use Of Relay Networking Mode

    As shown in the figure, the data sent by node 1 can be received by nodes 2 and 4, and the data sent by nodes 2 and 4 can also be received by node 1. Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 26: Hardware Design

    If the situation allows, you can make appropriate adjustments. isolation and shielding; If the communication line uses 5V level, a 1k-5.1k resistor must be connected in series (not recommended, there is still a  risk of damage); Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 27: Host Computer Configuration Instructions

    10, then the module address of Relay R should be set as 522. (The address of Relay R is 0X020A in hex, and it need to be converted to decimal. ) That is, the module address value that relay terminal R needs to fill in at this time is 522. Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 28: Frequently Asked Questions

    Unsatisfactory power supply may also cause garbled code, so be sure to ensure the reliability of the power supply;  Poor quality or too long extension cords and feeders will also cause a high bit error rate;  Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 29: Welding Operation Guidance

    Aveage ramp-down rate （Tp to Tsmax） average rate of decline 6℃/second max 6℃/second max Time from 25℃ to peak Time 25℃ to peak temperature 6 minutes max 8 minutes max temperature 12.2 Reflow soldering curve Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 30: Related Models

    Ultra-short straight, TX433-JZG-6 433M SMA-J antenna omnidirectional antenna rubber Ultra-short straight, TX433-JZ-5 433M SMA-J antenna omnidirectional antenna sucker TX490-XP-100 490M SMA-J sucker antenna, high gain antenna Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.
  • Page 31 915 M SMA-J Bendable rubber, T X915-JK-20 antenna omnidirectional antenna sucker 915 M Small sucker antenna, TX 915 -XP L -100 SMA-J antenna high cost performance Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

  • Page 32: Batch Packaging Methods

    V1.0 2024-03-21 first edition About Us Technical support: support@cdebyte.com Official website: https://www.ru-ebyte.com Company address: Building B2 and B5, No. 199, West District Avenue, High-tech West District, Chengdu City, Sichuan Province Copyright © 2012–2024 , Chengdu Ebyte Electronic Technology Co., Ltd.

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