EcoFlow Inc EFESP32UE Wi-Fi Bluetooth User Manual

EFESP32UE
technical specification

Module overview

1.1 Features
CPU and scratchpad memory

• 448 KB ROM

• 520 KB SRAM

• 16 KB RTC SRAM
  WiFi

• 802.11b/g/n

• Data rate up to 150 Mbps in 802.11n mode

• Supports A-MPDU and A-MSDU aggregation

• 0.4μs protection interval

• Working channel center frequency range: 2412 ~ 2484 MHz
  Bluetooth

• Bluetooth V4.2BR /EDR and Bluetooth LE standards

• Class-1, class-2 and class-3 launchers

• AFH

• CVSD and SBC
  operating conditions

• Operating voltage/supply voltage：3.0 ~ 3.6 V

• operating temperature：–40 ~ 85 °C

1.2 Description
EFESP32UE is a versatile Wi-Fi + Bluetooth + Bluetooth LE MCU module that is powerful and versatile for use in low-power sensor networks and extremely demanding tasks.
The module integrates traditional Bluetooth, Bluetooth Low Energy and Wi-Fi, and has a wide range of uses: Wi-Fi supports a wide range of communication connections, as well as direct connection to the Internet through a router; Bluetooth allows users to connect to a mobile phone or broadcast a BLE Beacon for signal detection.
The module supports data transfer rates up to 150 Mbps and antenna output power up to 20 dBm for maximum range wireless communication. As a result, this module has industry-leading technical specifications and excellent performance in terms of high integration, wireless transmission distance, power consumption and network connectivity.

Pin definition

2.1 Pin layout 2.2 Pin definition

Low: Off; the chip shuts down Note: Do not leave the pin floating.
SENSOR_VP| 4| I| GPIO36, ADC1_CHO, RTC_GPIOO
SENSOR_VN| 5| I| GPI039, ADC1_CH3, RTC_GPIO3
1034| 6| I| GPI034, ADC1_CH6, RTC_GPIO4
1035| 7| I| GPI035, ADC1_CH7, RTC_GPIO5
1032| 8| VO| GPI032, XTAL_32K_P (32.768 kHz crystal oscillator input), ADC1_CH4, TOUCH9, RTC_GPIO9
1033| 9| I/O| GPI033, XTAL_32K_N (32.768 kHz crystal oscillator output), ADC1_CH5, TOUCH8, RTC_GPIO8
1025| 10| I/O| GPIO25, DAC_1, ADC2_CH8, RTC_GPIO6, EMAC_RXDO
1026| 11| I/O| GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RXD1
1027| 12| VO| GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17, EMAC_RX_DV
1014| 13| I/O| GPIO14, ADC2_CH6, TOUCH6, RTC_GP1016, MTMS, HSPICLK, HS2_CLK, SD_CLK, EMAC_TXD2
1012| 14| VO| GPIO12, ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ, HS2_DATA2, SD_DATA2, EMAC_TXD3
GND| 15| P| Ground
1013| 16| I/O| GPIO13, ADC2_CH4, TOUCH4, RTC_GP1014, MTCK, HSPID, HS2_DATA3, SD_DATA3, EMAC_RX_ER
NC| 17| –| NC
NC| 18| –| NC
NC| 19| –| NC
NC| 20| –| NC
NC| 21| –| NC
NC| 22| –| NC
1015| 23| I/O| GPIO15, ADC2_CH3, TOUCH3, MTDO, HSPICSO, RTC_GPI013, HS2_CMD, SD_CMD, EMAC_RXD3
102| 24| I/O| GPIO2, ADC2_CH2, TOUCH2, RTC_GPI012, HSPIWP, HS2_DATAO, SD_DATA0
100| 25| I/O| GPIOO, ADC2_CH1, TOUCH 1, RTC_GPI011, CLK_OUT1, EMAC_DCCLK
104| 26| I/O| GPIO4, ADC2_CHO, TOUCHO, RTC_GPI010, HSPIHD, HS2_DATA1, SD_DATA1, EMAC_TX_ER
10163| 27| I/O| GPIO16, HS1_DATA4, U2RXD, EMAC_CLX_OUT
1017| 28| I/O| GPIO17, HS1_DATA5, U2TXD, EMAC_CLK_OUT_180
105| 29| I/O| GPIO5, VSPICSO, HS1_DATA6, EMAC_RX_CLK
1018| 30| I/O| GPIO18, VSPICLK, HS1_DATA7
Name| No.| Type1| Function
---|---|---|---
1019| 31| I/O| GPIO19, VSPIQ, UOCTS, EMAC_TXDO
NC| 32| –| –
1021| 33| I/O| GPIO21, VSPIHD, EMAC_TX_EN
RXDO| 34| I/O| GPIO3, UORXD, CLK_OUT2
TXDO| 35| I/O| GPIO1, UOTXD, CLK_OUT3, EMAC_RXD2
1022| 36| I/O| GPIO22, VSPIWP, UORTS, EMACTXD1
1023| 37| I/O| GPIO23, VSPID, HS1_STROBE
GND| 38| P| Ground

Electrical Characteristics

3.1 WiFi RF Characteristics
3.1.1 Transmitter Characteristics
Target TX power is configurable based on device or certification requirements. The default characteristics:

3.1.2 Receiver Characteristics

3.2 Bluetooth Radio
3.2.1 Transmitter Characteristics

3.2.2 Transmitter Characteristics

Parameter Conditions| Conditions| Min| Typ| Max| Unit
---|---|---|---|---|---
Sensitivity @30.8% PER| —| -94| -93| -92| dBm
Maximum received signal @30.8% PER| —| 0| —| —| dBm
Co-channel CA| —| —| +10| —| dB
Adjacent channel selectivity CA| F = FO + 1 MHz| —| -5| —| dB
F = FO -1 MHz| —| -5| —| dB
F=F0 + 2 MHz| —| -25| —| dB
F = FO- 2 MHz| —| -35| —| dB
F=F0 + 3 MHz| —| -25| —| dB
F = FO- 3 MHz| —| -45| —| dB
Out-of-band blocking performance| 30 MHz ∼ 2000 MHz| -10| —| —| dBm
2000 MHz ∼ 2400 MHz| -27| —| —| dBm
2500 MHz ∼ 3000 MHz| -27| —| —| dBm
3000 MHz ∼ 12.5 GHz| -10| —| —

| dBm
lntermodulation| —| -36| —| —| dBm

Integration Instructions

4.1 General
Host product manufacturers must follow 4.2 to 4.12 when integrating modules into host products.
4.2 List of applicable FCC rules
The module complies with FCC Part 15.247, FCC Part 15.249 and Canada RSS-247, RSS-210. It is applicable to the modular transmitter.
4.3 Summarize the specific operational use conditions
This radio transmitter FCC ID: 2A2P9-ESP32WROOM32E and IC: 27618-ESP32UE have been approved by Federal Communications Commission to operate with the antenna types listed below, with the maximum permissible gain indicated. Antenna types not included in this list that have a gain greater than the maximum gain indicated for any type listed are strictly prohibited for use with this device.
The concrete contents to check are the following three points.

1. Must use an antenna such as PCB Antenna with a gain not exceeding 6.04 dBi for BT and WIFI;
2. Should be installed so that the end user cannot modify the antenna;
3. Feed line should be designed in 50ohm

Fine-tuning of return loss etc. can be performed using a matching network. The antenna shall not be accessible for modification or change by the end user. A modification to the antenna is required FCC/ISED Class II permissive change.
This device has been approved as mobile device in accordance with FCC and ISED Canada RF exposure requirements. This means that a restricted minimum separation distance of 20cm between the antenna and any person.
A change in use that involves a separation distance ≤20cm (Portable usage) between the Module’s antenna and any persons is a change in the RF exposure of the module and, hence, is subject to a FCC Class 2 Permissive Change and a ISED Canada Class 4 Permissive Change policy in accordance with FCC KDB 996396 D01 and ISED Canada RSP-100.
This module is stand-alone modular. If the end product will involve the Multiple simultaneously transmitting condition or different operational conditions for a stand-alone modular transmitter in a host, host manufacturer have to consult with module manufacturer for the installation method in end system. the module could be subject to a FCC Class 2 Permissive Change and a ISED Canada Class 4 Permissive Change policy in accordance with FCC KDB 996396 D01 and ISED Canada RSP-100. I
4.4 Limited module procedures
Not applicable.
4.5 Trace antenna designs
Not applicable. The antenna connector is in the module, there no trance antenna designs.
4.6 RF exposure consideration
This equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This compliance to FCC radiation exposure limits for an uncontrolled environment, and minimum of 20cm separation between antenna and body.
The host product shall show the same or similar statement to the end users in the end-product manuals.
If the module is installed to a host / end product with a used distance <20cm, additional SAR evaluation or measurement must be followed according to FCC KDB 447498 and RSS-102.
If the module is installed to a host / end product with multiple transmitters, additional RF exposure evaluation must be performed for the simultaneous transmission condition per FCC KDB 447498 and RSS-102. A Formula is also showed below:The procedure rules are provided in 4.3 in this document. As the module manufacturer is still taking responsibility for the compliance of this module, if you have any changes mentioned above, you must advise and get the help from us with the contact information as shown below 4.12.
4.7 Antennas
Antenna connector: IPEX connector.
Antennas requirements and antenna gain

4.8 Label and compliance information
Please notice that if the FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. That displays the contents shown in below:
Contains FCC ID: 2A2P9-ESP32WROOM32E
Contains IC: 27618-ESP32UE
This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions:

1. this device may not cause harmful interference, and
2. this device must accept any interference received, including interference that may cause undesired operation.

4.9 Information on test modes and additional testing requirements
Additional testing requirements should be taking into account for different operating conditions for the transmitter function.
If this module is operated as a stand-alone modular in a host:
❖ Radiated spurious emission per FCC Part 15.247, 15.249 and RSS247, RSS-210.
❖ The host should be operated in all its normal mode with the modular transmitter active.
❖ Please follow 4.11 in this document to obtain a best radio engineer design.
If this module is operated as multiple simultaneously transmitting modules in a host:
❖ Foundation frequency power, Radiated spurious emission per FCC Part 15.249 and RSS-210.
Conducted spurious emission and conducted power per FCC part 15.247 and RSS-247.
❖ Please contact the modular manufacturer through the contact information shown below 4.12 to get the test software.
❖ This module should be operated in transmitter mode with other transmitter for the simultaneous condition.
❖ Please follow 4.11 in this document to obtain a best radio engineer design.
❖ The procedure rules are provided in 4.3 in this document. As the module manufacturer is still taking responsibility for the compliance of this module, if you have any changes mentioned above, you must advise and get the help from us with the contact information as shown below 4.12.
4.10 Additional testing, Part 15 Subpart B disclaimer
Statement:
The module complies with and authorized for transmitter rule: FCC Part 15.247, FCC Part 15.249 and Canada RSS-247, RSS-210. However, the host may also contain other unintentional-radiator digital functions / circuits. This digital functions / circuits are required additional FCC / ISED rules: FCC part 15B and relevant ICES standard, which are not covered by the modular certification. The host manufacturer is responsible for compliance to this additional FCC / ISED rules. And the host manufacturer should state the FCC / ISED SDOC compliance information.
4.11 Note EMI Considerations
EMI consideration for transmitting simultaneously:
This module is stand-alone modular. If the end product has multiple certified modules integrated in a host and transmitting simultaneously: When after radiated emission testing, if there are no additional emissions generated due to simultaneous-transmission operations compared to single transmitter operations testing, it is not necessary to file the additional simultaneous transmission test data. FCC class II permissive changes is no necessary.
However, RF exposure for transmitting simultaneously also needed, please refer to 4.6 in this document.
To obtain better engineer design while installing this module:
It is recommended to place the module as close as possible to the edge of the baseplate. If conditions permit, make the antenna feed point closest to the edge of the baseplate. Please ensure that the module is not covered by any metal shell. Do not lay copper, wire, or place components in the antenna area of the module PCB.
4.12 How to make changes
Only the module grantee is permitted to make permissive changes. If the host integrator is expected to install the module in a way different from this manual or want to change the module, please contact:
Company: EcoFlow Inc.
Address: 1st Floor, Building 1, Plant E, Jiehe Industrial City, Shuitian Community, Shiyan Street, Bao’an District, Shenzhen Guangdong China
Telephone No: 0755-86660185
Email: david.wu@ecoflow.com

FCC/IC statements

5.1 FCC statements:
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• onnect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions:

1. this device may not cause harmful interference, and
2. this device must accept any interference received, including interference that may cause undesired operation.

Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
This equipment complies with FCC’s and IC’s RF radiation exposure limits set forth for an uncontrolled environment. The antenna(s) used for this transmitter must be installed and operated to provide a separation distance of at least 20 cm from all persons and must not be collocated or operating in conjunction with any other antenna or transmitter. Installers must ensure that 20cm separation distance will be maintained between the device and users.
5.2 ISED statements:
This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s licence-exempt RSS(s). Operation is subject to the following two conditions:

1. This device may not cause interference.
2. This device must accept any interference, including interference that may cause undesired operation of the device.

This equipment complies with IC’s RF radiation exposure limits set forth for an uncontrolled environment. The antenna(s) used for this transmitter must be installed and operated to provide a separation distance of at least 20 cm from all persons and must not be collocated or operating in conjunction with any other antenna or transmitter. Installers must ensure that 20cm separation distance will be maintained between the device and users.

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