Ebyte E104-BT5040U User manual

E104-BT5040U User manual
nRF52840 USB-Type Bluetooth Module

Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT5040U Datasheet
Copyright©2020, Chengdu Ebyte Electronic Technology Co., Ltd.
Contents
Contents.................................................................................................................................................................................. 1
1.1 Introduction...............................................................................................................................................................1
1.2 Features.....................................................................................................................................................................2
1.3 Applications.............................................................................................................................................................. 2
2. Parameters...........................................................................................................................................................................3
2.1 Limit Parameters.......................................................................................................................................................3
2.2 Working Parameters..................................................................................................................................................3
3. Dimensions and Pin Definition...........................................................................................................................................5
4. Development.......................................................................................................................................................................7
4.1 Development Tool.....................................................................................................................................................7
4.2Factory Default Firmware..........................................................................................................................................7
4.3The Modified Codes.................................................................................................................................................. 8
4.3.Public Key(dfu_public_key.c).................................................................................................................................. 8
4.3.2 Disable Hash value check function........................................................................................................................8
4.4 DFU Guide................................................................................................................................................................9
5. Hardware Notice...............................................................................................................................................................11
5.1 Hardware Notice..................................................................................................................................................... 11
6. FAQ...................................................................................................................................................................................12
6.1 Communication range is too short.......................................................................................................................... 12
6.2 Module is easy to damage.......................................................................................................................................12
6.3 Error Rate is High................................................................................................................................................... 12
7. Welding Guide.................................................................................................................................................................. 13
7.1 Reflow Temperature................................................................................................................................................13
7.2 Reflow Curve..........................................................................................................................................................13
8. Revision history................................................................................................................................................................14
9. About Us........................................................................................................................................................................... 14
1. Introduction...........................................................................................................................................................................

Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT5040U Datasheet
Copyright©2020, Chengdu Ebyte Electronic Technology Co., Ltd.
1.1 Introduction
E104-BT5040U is a small Bluetooth wireless module with USB interface
designed and produced by Ebyte; the function and pin of the module
correspond to the official Nordic nRF52840 USB Dongle module (the relevant
schematic diagram can be downloaded on the official website of Nordic). It
comes with a high-performance PCB antenna and uses the Bluetooth Low
Energy (BLE) SOC solution.
E104-BT5040U uses Nordic imported genuine nRF52840 RF chip which
supports Bluetooth 4.2 and Bluetooth 5.0; the chip comes with
high-performance ARM CORTEX-M4 core, 32M+32.768kHz industrial-grade
crystal oscillator, and has UART, I2C, SPI, ADC, DMA Rich peripheral resources such as, PWM, etc.; nRF52840 leads to most of the
I/O ports (please check the pin definitions for details), which is convenient for users to carry out multi-directional development.
E104-BT5040U is a hardware platform with factory program. See below for specific usage.
1.2 Features
Under ideal conditions, the communication distance can reach 250m;
The maximum transmit power is 6mW, and the software is multi-level adjustable;
Support the global license-free ISM 2.4GHz frequency band;
Equipped with 32.768kHz clock crystal oscillator;
Built-in high-performance low-power ARM@Cortex-M4 processor;
Sufficient memory: 1024kB Flash, 256kB RAM;
USB power supply, USB has ESD protection;
Industrial-grade standard design, supporting long-term use at -40℃~85℃;
PCB antenna without external antenna.
1.3 Applications
Smart home and industrial sensors, etc.;
Security system, positioning system;
Wireless remote control, UAV;
Wireless game remote control;
Healthcare products;
Wireless voice
Automotive industry applications.

Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT5040U Datasheet
Copyright©2020, Chengdu Ebyte Electronic Technology Co., Ltd.
2. Parameters
2.1 Limit Parameters
The main parameters
Value
Notice
Min
Max
USB power supply voltage (V)
0
5.5
Over 5.5V will permanently burn the module
VBUS power supply hole (V)
0
5.5
Over 5.5V will permanently burn the module
VDD power supply hole power
supply (V)
0
3.6
Over 3.6V will permanently burn the module
Blocking power (dBm)
-
10
It is less likely to burn when used at close range
Working temperature (℃)
-40
+85
Industrial grade
2.2 Working Parameters
Description
Value
Notes
Min
Typical
Max
Working voltage (V)
4.35
5
5.5
USB/VBUS power supply
Communication level (V)
0
3.3
3.6
Using 5V level is risky to burn
Working temperature (℃)
-40
-
+85
Industrial design
Working frequency (MHz)
2360
2402
2500
Support ISM frequency band
TX
TX only run current (DCDC, 3V) PRF =+8 dBm（mA）
17.05
TX only run current (DCDC, 3V) PRF =+4 dBm（mA）
12.68
TX only run current (DCDC, 5V, REG0 out = 3.3 V)PRF
= 0dBm（mA）
7.25
TX only run current (DCDC, 3V)PRF = 0dBm（mA）
7.63
TX current (3V) 1Mbps BLE measured from VBAT with
PRF=9dBm（mA）
32
RX
RX only run current (DCDC, 3V) 1Mbps / 1Mbps BLE
（mA）
7.71
RX only run current (DCDC, 3V) 2Mbps / 2Mbps BLE
（mA）
8.27
Max TX Power（dBm）
7.5
8
8.5
Rx Sensitivity（dBm）
-103dBm@BLE 125kbps
Long range mode
-95dBm@BLE 1Mbps

Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT5040U Datasheet
Copyright©2020, Chengdu Ebyte Electronic Technology Co., Ltd.
Description
Value
Notes
Reference distance
250m
Clear weather, open location, antenna height 2.5 meters, air
rate 1Mbps
Crystal frequency
32MHz/32.768kHz
supporting agreement
BLE4.2/5.0
Power supply
USB/1.27mm 孔
Interface method
USB/1.27mm 孔
IC full name
nRF52840-QIAAC0/aQFN TM
73
FLASH
1024kB
RAM
256kB
Kernel
ARM@ Cortex ® -M4
Dimensions
59*18mm
Housing and ports size counted
Antenna Type
PCB Antenna

Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT5040U Datasheet
Copyright©2020, Chengdu Ebyte Electronic Technology Co., Ltd.
3. Dimensions and Pin Definition

Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT5040U Datasheet
Copyright©2020, Chengdu Ebyte Electronic Technology Co., Ltd.
Pin No.
Name
Direction
Functions
1
GND
—
Power Ground
2
P0.10
J24
See nRF52840 chipset datasheet
3
P0.09
L24
See nRF52840 chipset datasheet
4
P1.04
U24
See nRF52840 chipset datasheet
5
P1.02
W24
See nRF52840 chipset datasheet
6
P1.00
AD22
See nRF52840 chipset datasheet
7
P1.07
P23
See nRF52840 chipset datasheet
8
P1.01
Y23
See nRF52840 chipset datasheet
9
P0.24
AD20
See nRF52840 chipset datasheet
10
P0.22
AD18
See nRF52840 chipset datasheet
11
P0.20
AD16
See nRF52840 chipset datasheet
12
P0.17
AD12
See nRF52840 chipset datasheet
13
P0.15
AD10
See nRF52840 chipset datasheet
14
P0.13
AD8
See nRF52840 chipset datasheet
15
P0.14
AC9
See nRF52840 chipset datasheet
16
VBUS
USB5V
This interface cannot be powered at the same time as the USB interface, the maximum is 5.5V
17
VDD
—
Chip power supply pin, maximum 3.6V, cannot be supplied with USB power supply at the same time
18
GND
—
Power Ground
19
P0.04
J1
See nRF52840 chipset datasheet
20
P0.26
G1
See nRF52840 chipset datasheet
21
P0.11
B19
See nRF52840 chipset datasheet
22
P0.31
A8
See nRF52840 chipset datasheet
23
P0.29
A10
See nRF52840 chipset datasheet
24
P0.02
A12
See nRF52840 chipset datasheet
25
P1.15
A14
See nRF52840 chipset datasheet
26
P1.13
A16
See nRF52840 chipset datasheet
27
P1.11
B19
See nRF52840 chipset datasheet
28
P1.10
A20
See nRF52840 chipset datasheet
29
GND
—
Power Ground
30
GND
—
Power Ground
31
V
VDD
Download interface, try to avoid USB and VDD supplying power at the same time
32
R
RESET
33
D
SWDIO
34
C
SWCLK
35
G
GND
36
RST
RESET
Reset button.
37
SW
P1.06
function button
38
LED1
RGB LED
R (red): P0.08; G (green): P1.09; B (blue): P0.12;
39
LED
LED
P0.06
40
G
GND
USB Test Port
41
D+
42
D-

Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT5040U Datasheet
Copyright©2020, Chengdu Ebyte Electronic Technology Co., Ltd.
43
V
VBUS
USB Test Port
4. Development
4.1 Development Tool
No.
Item
Notes
1
Burn
Firmware
1.The module is embedded with ARM MCU. For program downloading, please use the J-LINK
downloader. Any other serial port or JTAG、ISP、ICP are unavailable to download.
The burn firmware needs to be completed in two parts. Since the protocol stack provided by NORDIC
is not loaded in the program, in the second development, you need to use the official burning tool
nRFgo studio to burn the protocol stack, and then use nRFgo studio to burn. The hex of the application
code; you can also use the official burning tool nRFgo studio to burn the protocol stack, and then
download it with IAR or KEIL.
2
Testing
Board
Testing board is not available.
4.2Factory Default Firmware
The factory firmware of E104-BT5040U is only DFU firmware (device firmware upgrade).
Main features of DFU:
Update application, SoftDevice and bootloader
Certification update
Downgrade prevention
Hardware compatibility verification
Multiple transmission methods: (BLE, UART, USBD)
Support application with or without SoftDevice
Support the replacement of SoftDevice-dependent firmware with SoftDevice-independent firmware
Support the replacement of SoftDevice-independent firmware with SoftDevice-dependent firmware
The factory DFU firmware is compiled with the sample program "nRF5SDK160098a08e2\examples\dfu\open_bootloader" in the
SDK16.0 firmware (nRF5SDK160098a08e2.zip).

Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT5040U Datasheet
Copyright©2020, Chengdu Ebyte Electronic Technology Co., Ltd.
4.3The Modified Codes
4.3.Public Key(dfu_public_key.c)
#ifdef NRF_DFU_DEBUG_VERSION
/** @brief Public key used to verify DFU images */
__ALIGN(4)const uint8_t pk[64] =
{
0x1b,0x0c,0xae,0x9f,0x22,0x80,0x60,0xa1,0x85,0xa0,0xba,0x18,0xe7,0xaf,0xfc,0x94,0x63,0xfb,0xd2,0x58,0xac,
0xde,0x1c,0xa0,0x1d,0x2a,0xd2,0x0d,0x25,0x72,0x9f,0x37,
0x57,0x00,0xc4,0xf6,0x0b,0x92,0x21,0x44,0x85,0x70,0x5d,0xbe,0x62,0x0d,0x9e,0x09,0x82,0x02,0xf8,0xec,
0x3b,0xcd,0x06,0xb5,0xc9,0x68,0xc7,0xff,0x2e,0xe7,0x95,0x4a
};
#else
/** @brief Public key used to verify DFU images */
__ALIGN(4)const uint8_t pk[64] =
{
0xc2,0xdf,0x7a,0x7f,0x4a,0x64,0xcd,0x56,0x63,0x77,0x82,0x94,0x49,0x70,0xe8,0x1b,0x8f,0x69,0x31,0xd7,0xcb,
0x71,0x0f,0x2d,0xcc,0x03,0x7d,0x6f,0x26,0x14,0x1d,0x32,
0x55,0xa2,0x2f,0xea,0x7e,0x1d,0xca,0x52,0xa0,0x86,0x9f,0xee,0x16,0x43,0xc8,0x8e,0x3f,0xbc,0xcc,0xa3,0x2b,
0x36,0xe1,0x0e,0xdb,0xeb,0x6f,0x7b,0x3c,0x79,0x67,0x55
};
#endif
4.3.2 Disable Hash value check function
File Routing：“nRF5SDK160098a08e2\components\libraries\bootloader\dfu\nrf_dfu_validation.c”. Disable below codes.
err_code =nrf_crypto_ecdsa_verify(&m_verify_context,
&m_public_key,
m_init_packet_hash,
hash_len,
m_signature,
sizeof(m_signature));
// if (err_code != NRF_SUCCESS)
// {
// NRF_LOG_ERROR("Signature failed (err_code: 0x%x)", err_code);
// NRF_LOG_DEBUG("Signature:");
// NRF_LOG_HEXDUMP_DEBUG(m_signature, sizeof(m_signature));
// NRF_LOG_DEBUG("Hash:");
// NRF_LOG_HEXDUMP_DEBUG(m_init_packet_hash, hash_len);

Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT5040U Datasheet
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// NRF_LOG_DEBUG("Public Key:");
// NRF_LOG_HEXDUMP_DEBUG(pk, sizeof(pk));
// NRF_LOG_FLUSH();
//
// return NRF_DFU_RES_CODE_INVALID_OBJECT;
// }
4.4 DFU Guide
There are many ways to use DFU, such as upgrading through APP, UART upgrading, etc. Here we only introduce how to use
E104-BT5040U and nrf connect.
The version of nrf connect in the document is V3.3.1. Start the nrf connect software, as shown in the figure below:
Take the first item as an example (Bluetooth Low Energy). Select "Open" to display the interface as shown in the figure below, and
select "Launch anyway". Start the Bluetooth Low Energy APP.
Select the virtual serial port corresponding to E104-BT5040U.

Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT5040U Datasheet
Copyright©2020, Chengdu Ebyte Electronic Technology Co., Ltd.
E104-BT5040U has no application firmware when it is powered on for the first time. The app will prompt the user to program the
module, select "Yes" and wait for the firmware update to complete.
After the firmware update is complete, the following page appears. At this time, you can use the bluetooth low energy function
normally.

Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT5040U Datasheet
Copyright©2020, Chengdu Ebyte Electronic Technology Co., Ltd.
5. Hardware Notice
5.1 Hardware Notice
It is recommended to use a DC stabilized power supply to supply power to the module, and the power ripple coefficient is as
small as possible, and the module needs to be grounded reliably;
Please pay attention to the correct connection of the positive and negative poles of the power supply. Reverse connection may
cause permanent damage to the module;
Please check the power supply to ensure that it is within the recommended supply voltage. If it exceeds Max, it will cause
permanent damage to the module;
Please check the stability of the power supply, the voltage should not fluctuate greatly and frequently;
When designing the power supply circuit for the module, it is often recommended to reserve more than 30% of the margin, and
the whole machine is conducive to long-term stable operation;
The module should be as far away as possible from the power supply, transformer, high-frequency wiring and other parts with
large electromagnetic interference;
High-frequency digital wiring, high-frequency analog wiring, and power wiring must avoid the bottom of the module. If it is
necessary to pass under the module, assume that the module is soldered to the Top Layer, and the top layer of the contact part of the
module is covered with copper (all copper And well grounded), it must be close to the digital part of the module and routed in the
Bottom Layer;
Assuming that the module is soldered or placed on the Top Layer, it is also wrong to randomly route the wires on the Bottom
Layer or other layers, which will affect the stray and receiving sensitivity of the module to varying degrees;
Assuming that there are components with large electromagnetic interference around the module, it will greatly affect the value of
the module. According to the intensity of the interference, it is recommended to stay away from the module. If the situation permits,
proper isolation and shielding can be done;
Assuming that there are traces with large electromagnetic interference around the module (high-frequency digital,
high-frequency analog, power wiring), it will greatly affect the value of the module. According to the intensity of the interference, it is
recommended to stay away from the module. 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);
Try to stay away from part of the physical layer that is also 2.4GHz TTL protocol, for example: USB3.0;
The antenna installation structure has a great influence on the value of the module. Make sure that the antenna is exposed,
preferably vertically upward. When the module is installed inside the case, a high-quality antenna extension cable can be used to
extend the antenna to the outside of the case;
The antenna must not be installed inside the metal shell, which will greatly reduce the transmission distance.
It is recommended to add a 200R protection resistor to the RXD/TXD of the external MCU.

Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT5040U Datasheet
Copyright©2020, Chengdu Ebyte Electronic Technology Co., Ltd.
6. FAQ
6.1 Communication range is too short
When there is a straight line communication obstacle, the communication distance will be attenuated accordingly;
Temperature, humidity, and co-frequency interference will increase the communication packet loss rate;
The ground absorbs and reflects radio waves, and the test results near the ground are poor;
Sea water has a strong ability to absorb radio waves, so the seaside test results are poor;
If there is a metal object near the antenna or placed in a metal shell, the signal attenuation will be very serious;
The power register setting is wrong, the air speed setting is too high (the higher the air speed, the closer the distance);
The low voltage of the power supply at room temperature is lower than the recommended value, the lower the voltage, the lower
the power output;
The matching degree of the antenna and the module is poor or the quality of the antenna itself is problematic.
6.2 Module is easy to damage
Please check the power supply to ensure that it is within the recommended power supply voltage. If it exceeds Max, the module
will be permanently damaged;
Please check the stability of the power supply, the voltage should not fluctuate greatly and frequently;
Please ensure anti-static operation during installation and use, and high-frequency components are electrostatically sensitive;
Please ensure that the humidity during installation and use should not be too high, and some components are humidity sensitive
devices;
If there is no special requirement, it is not recommended to use it at too high or too low temperature.
6.3 Error Rate is High
There is co-frequency signal interference nearby, stay away from the interference source or modify the frequency and channel to
avoid interference;
The clock waveform on SPI is not standard, check whether there is interference on the SPI line, and the SPI bus line should not
be too long;
Unsatisfactory power supply may also cause garbled codes. Ensure the reliability of the power supply;
Poor or too long extension cables and feeders can also cause high bit error rates.

Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT5040U Datasheet
Copyright©2020, Chengdu Ebyte Electronic Technology Co., Ltd.
7. Welding Guide
7.1 Reflow Temperature
Profile Feature
曲线特征
Sn-Pb Assembly
Pb-Free Assembly
Solder Paste
锡膏
Sn63/Pb37
Sn96.5/Ag3/Cu0.5
Preheat Temperature min （Tsmin）
最小预热温度
100℃
150℃
Preheat temperature max (Tsmax)
最大预热温度
150℃
200℃
Preheat Time (Tsmin to Tsmax)(ts)
预热时间
60-120 sec
60-120 sec
Average ramp-up rate(Tsmax to Tp)
平均上升速率
3℃/second max
3℃/second max
Liquidous Temperature (TL)
液相温度
183℃
217℃
Time（tL）Maintained Above（TL）
液相线以上的时间
60-90 sec
30-90 sec
Peak temperature（Tp）
峰值温度
220-235℃
230-250℃
Aveage ramp-down rate（Tp to Tsmax）
平均下降速率
6℃/second max
6℃/second max
Time 25℃to peak temperature
25℃到峰值温度的时间
6 minutes max
8 minutes max
7.2 Reflow Curve

Chengdu Ebyte Electronic Technology Co., Ltd. E104-BT5040U Datasheet
Copyright©2020, Chengdu Ebyte Electronic Technology Co., Ltd.
8. Revision history
Version
Date
Description
Issued by
1.0
2020-11-20
Initial Version
Ren
9. About Us
Sales hotline: [phone] Tel: [phone]
Support: sup[email protected]om Website: www.ebyte.com
Address: Innovation Center B333~D347, 4# XI-XIN road,High-tech district (west), Chengdu, Sichuan, China