1. Overview
Name
No. Type Function
RXD 2 I/O U0RXD
TXD 3 I/O U0TXD
HOme_earth_module is a generic Wi-Fi+BT+BLE MCU module that targets a wide variety of
applications, ranging from home appliances, such as air condition, humidifier and refrigerator.
At the core of this module is the ESP32 chip. The chip embedded is designed to be scalable and
adaptive. There are two CPU cores that can be individually controlled, and the clock frequency is
adjustable from 80 MHz to 240 MHz. The user may also power off the CPU and make use of the
low-power co-processor to constantly monitor the peripherals for changes or crossing of
thresholds.
Table 2 provides the specifications of hOme_earth_module
1. Pin Definitions
1.1 Pin Layout
Figure 1: hOme_earth_module Pin layout
1.2 Pin Description
hOme_earth_module has 4 pins. See pin definitions in Table 3.
Table 3: Pin Definitions
VCC 1 P Power supply
GND 4 P Ground
2. Functional Description
This chapter describes the modules and functions integrated in hOme_earth_module.
2.1 CPU and Internal Memory
ESP32-D0WDQ6 contains two low-power Xtensa® 32-bit LX6 microprocessors. The internal
memory includes:
● 448 kB of ROM for booting and core functions.
● 520 kB (8 kB RTC FAST Memory included) of on-chip SRAM for data and instruction.
- 8 kB of SRAM in RTC, which is called RTC FAST Memory and can be used for data
storage; it is accessed by the main CPU during RTC Boot from the Deep-sleep mode.
● 8 kB of SRAM in RTC, which is called RTC SLOW Memory and can be accessed by the coprocessor during the Deep-sleep mode.
● 1 kbit of eFuse, of which 256 bits are used for the system (MAC address and chip
configuration) and the remaining 768 bits are reserved for customer applications, including
Flash-Encryption and Chip-ID.
2.2 Crystal Oscillators
The ESP32 Wi-Fi/BT firmware can only support 40 MHz crystal oscillator for now.
FCC LABEL:
FCC ID: 2ANVP-W5X6X
FCC STATEMENT
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
2) This device must accept any interference received, including
interference that may cause undesired operation.
3.USER MANUAL
HOme_earth_module connect to the device via UART and protocol, and we
could use PC to download the firmware and check the information from the
module. When download the firmware, please connect GPIO0 to GND ( Short
jumper on J2)
Federal Communication Commission Statement (FCC, U.S.)
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 of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect 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.
FCC Caution:
Any changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate this equipment.
IMPORTANT NOTES
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with minimum distance
20cm between the radiator & your body.
Co-location warning:
This transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter.
Limited Channels fixed for use in the US:
IEEE 802.11b or 802.11g or 802.11n(HT20) operation of this product in the U.S. is
firmware-limited to Channel 1 through 11. IEEE 802.11n(HT40) operation of this product
in the U.S. is firmware-limited to Channel 3 through 9.
OEM integration instructions:
This device is intended only for OEM integrators under the following conditions:
The antenna must be installed such that 20 cm is maintained between the antenna and
users, and the transmitter module may not be co-located with any other transmitter or
antenna. The module shall be only used with the external antenna(s) that has been
originally tested and certified with this module.
As long as 3 conditions above are met, further transmitter test will not be required.
However, the OEM integrator is still responsible for testing their end-product for any
additional compliance requirements required with this module installed (for example,
digital device emissions, PC peripheral requirements, etc.).
Validity of using the module certification:
In the event that these conditions cannot be met (for example certain laptop
configurations or co-location with another transmitter), then the FCC authorization for this
module in combination with the host equipment is no longer considered valid and the
FCC ID of the module cannot be used on the final product. In these circumstances, the
OEM integrator will be responsible for re-evaluating the end product (including the
transmitter) and obtaining a separate FCC authorization.
End product labeling:
This transmitter module is authorized only for use in device where the antenna may be
installed such that 20 cm may be maintained between the antenna and users. The final
end product must be labeled in a visible area with the following: “Contains Transmitter
Module FCC ID: 2ANVP-W5X6X.
Information that must be placed in the end user manual:
The OEM integrator has to be aware not to provide information to the end user regarding
how to install or remove this RF module in the user's manual of the end product which
integrates this module. The end user manual shall include all required regulatory
information/warning as show in this manual.
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