Heltec Sufficient IoT Hub A Linux Based IoT Terminal Device User Manual
- June 15, 2024
- HELTEC
Table of Contents
Sufficient IoT Hub
A Linux Based IoT Terminal Device User Manual
Document version
| Version | Time | Description | Remark |
|---|---|---|---|
| Rev. 1.0 | 12/14/2022 | Documents creating | Navi |
| Rev. 1.1 | 3/1/2023 | Information update | Aaron Lee |
Copyright Notice
All contents in the files are protected by copyright law, and all copyrights
are reserved by Chengdu Heltec Automation Technology Co., Ltd. (hereinafter
referred to as Heltec).
Without written permission, all commercial use of the files from Heltec are
forbidden, such as copy, distribute, reproduce the files, etc., but non-
commercial purpose, downloaded or printed by individual are welcome.
Disclaimer
Chengdu Heltec Automation Technology Co., Ltd. reserves the right to change, modify or improve the document and product described herein. Its contents are subject to change without notice. These instructions are intended for you use.
Sufficient IoT Hub Overview
The Sufficient IoT Hub is a Linux system-in-package with a dual-core 64-bit
ARM A7 processor running at 1GHz and 128MB of DDR3. This is an IoT-only device
that includes LoRa, Wi-Fi, and Bluetooth. We created a dedicated Sufficient
IoT OS for it, which also includes a CLI application and web UI to operate
onboard resources directly. So that even if the user has no programming
experience, they can efficiently operate PWM, I2C, SPI, LoRa, and other
protocols to develop whatever they desire.
It can, for instance, be used to read sensor data from I2C and transmit it via
LoRaWAN, as an MQTT broker, as a LoRa Server in a local area network, or even
as a LoRa gateway via an expansion panel.
Sufficient IoT Hub are available in the following product variants:
Table 1.1 Product model list
| No. | Model | Description |
|---|---|---|
| 1 | Sufficient IoT Hub (LF) | 433~510MHz working LoRa Node frequency, used |
for China mainland (CN470) LPW band.
2| Sufficient IoT Hub (HF)| For EU868, IN865, US915, AU915, AS923, KR920
and other LPW networks with operating frequencies between 863~928MHz.
1.1 Product Features
➢ Allwinner T1113-S3 processor, Dual-Core ARM Cortex™ -A7 800MHz CPU.
-
128MB SiP DDR3 RAM, Micro TF card slot.
-
Work with Sufficient IoT OS, a dedicated OS for this device, it’s based on Linux
(5.4.61 Kernel, 32-bits) Debian 10 Operating system. -
Built in Sufficient IoT application, allow user to operate onboard resources efficiently.
➢ On-board Peripherals
- XR829 (Wi-Fi and Bluetooth capabilities available)
- SX1262 (provides LoRa node functionality)
➢ On-Board Interface
- One 10/100M Ethernet interface (RJ45 connector)
- One TF card slot
- A three-wire debug serial port
- One 5V power input connector
- One USB HOST Type C interface
- A TWI interface
- Two universal UART interfaces
- One SPI interface
- One ADC interface
- Two PWM interfaces
➢ Interact
- A reset button
- Two functional button
- A power light.
- A user-defined light
➢ Input power：+5V or +3.3V
➢ Operating temperature：-40°C～85 °C
➢ Encryption chip.
Specifications **
**
2.1 General specifications
Table 2-1: General specifications
| Parameters | Description |
|---|---|
| MCU | Dual-Core ARM CortexTM-A7 CPU, 800MHz. |
| LoRa Chip | SX1262 |
| LoRa Frequency | 863～870MHz, 902～928MHz, 470～510MHz |
| LoRa Max. TX Power | 21 ± 1 dBm |
| Wi-Fi | 802.11 b/g/n |
| Ethernet | 100M RJ45 socket |
| Supply voltage | +5V, +3.3V |
| Power consumption | Max. ≈ 150mA, standby ≈ 100mA |
| Operating temperature | -40 ~ 85 ℃ |
| Dimensions | 90 x 41 x 11 mm |
| Clock Inputs | • OSC — 32.768KHz external crystal. |
• DCXO — 24MHz external crystal.
2.2 Operating conditions
2.2.1 Power supply range
Except when USB or 5V Pin is connected separately, only a single power supply
can be connected.
Table 2-2: Power supply range
| Power supply mode | Minimum | Typical | Maximum | Company |
|---|---|---|---|---|
| 5V Power Adapter(≥500mA) | 4.7 | 5 | 5.5 | V |
| Type-C USB(≥500mA) | 4.7 | 5 | 5.5 | V |
| 5V Pin (≥500mA) | 4.7 | 5 | 5.5 | V |
2.2.2 Power output
Table 2-3: Power output
| Output Pin | Minimum | Typical | Maximum | Company |
|---|---|---|---|---|
| 5V Pin | 2000 | mA | ||
| 3.3V Pin | 2000 | mA |
2.2.3 Power characteristics
Table 2-4: Power characteristics
| Mode | Condition | Min. | Typical | Max. | Company |
|---|---|---|---|---|---|
| IDLE | USB powered | 98 | mA | ||
| Wi-Fi | USB powered | 110 | mA | ||
| Ethernet | USB powered | 100 | mA | ||
| SX1262_TX | 22dBm, USB powered | 150 | mA | ||
| SX1262_RX | USB powered | 108 | mA |
2.3 LoRa RF characteristics
2.3.1 Transmit power
Table 2-5 Transmit power
| Operating frequency band | Maximum power value/[dBm] |
|---|---|
| 470~510 MHz | 21 ± 1 |
| 867~870 MHz | 21 ± 1 |
| 902~928 MHz | 21 ± 1 |
2.3.2 Receiving sensitivity
The following table gives typically sensitivity level of the Sufficient IoT
Hub (L/H).
Table 2-6: Receiving sensitivity.
| Signal Bandwidth/[KHz] | Spreading Factor | Sensitivity/[dBm] |
|---|---|---|
| 125 | SF12 | -139 |
| 125 | SF10 | -130 |
| 125 | SF7 | -124 |
2.5 Onboard Resource
2.6 Pin definition
2.6.1 Pin assignment
2.6.2 Pin description
- The function described in red font is only for illustration, indicating that the pin has been used for special functions and cannot be used as GPIO.
General purpose GPIO row of 32 pin ports. They allow you to integrate
Sufficient loT Hub into your projects, and these expansion ports can be
configured for many different purposes.
Table 2-7: Sufficient IoT Hub pin description
| No. | Name | Type | Function 1 | GPIO NUM (PA0=0) 2 |
|---|---|---|---|---|
| 1 | GND | P | Ground. | – |
| 2 | 5V | P | Input/Output 5V. | – |
| 3 | GND | P | Ground | – |
| 4 | 3.3V | P | Output 3.3V, power supply or external device. | – |
| 5 | PE13 | I/O | PE13 | 141 |
| 6 | PE12 | I/O | PE12 | 140 |
| 7 | PD0 | I/O | PD0, User key. | 96 |
| 8 | PD22 | I/O | PD22, User key. | 118 |
| 9 | TWI2_SDA | I/O | PD21 , TWI2_SDA | – |
| 10 | TWI2_SCK | I/O | PD20 , TWI2_SCK | – |
| 11 | UART2_TX | I/O | PD1 , UART2_TX | – |
| 12 | UART2_RX | I/O | PD2 , UART2_RX | – |
| 13 | PD3 | I/O | PD3 | 99 |
| 14 | PD4 | I/O | PD4 | 100 |
| 15 | PD5 | I/O | PD5 | 101 |
| 16 | PD6 | I/O | PD6 | 102 |
| 17 | UART4_TX | I/O | PD7 , UART4_TX | – |
| 18 | UART4_RX | I/O | PD8 , UART4_RX | – |
| 19 | PD9 | I/O | PD9 | 105 |
| 20 | RESET | I, OD | Reset Signal (low active) | – |
| 21 | SPI1_CS | I/O | PD10 , SPI1_CS | – |
| 22 | SPI1_CLK | I/O | PD11 , SPI1_CLK | – |
| 23 | SPI1_MISO | I/O | PD13 , SPI1_MISO | – |
| 24 | SPI1_MOSI | I/O | PD12 , SPI1_MOSI | – |
| 25 | PD14 | I/O | PD14 | 110 |
| 26 | PD15 | I/O | PD15 | 111 |
| 27 | PD18 | I/O | PD18, PWM2 | – |
¹The function described in red font is only for illustration, indicating that
the pin has been used for special functions and cannot be used as GPIO.
²GPIO number in system, the calculation formula is: M * 32 + n (M is pin
group, A=0, B=1, etc.). For example —
PB2: 1 * 32 + 2 = 34.
| 28 | PD19 | I/O | PD19, PWM3 | – |
|---|---|---|---|---|
| 29 | UART3_RX | I/O | PB7, UART3_RX, debug RX | – |
| 30 | UART3_TX | I/O | PB6, UART3_TX, debug TX | – |
| 31 | PB5 | I/O | PB5 | 37 |
| 32 | PB4 | I/O | PB4 | 36 |
| 33 | PB3 | I/O | PB3 | 35 |
| 34 | PB2 | I/O | PB2 | 34 |
| 35 | TP-X1 | AI | TP-X1 | – |
| 36 | TP-X2 | AI | TP-X2 | – |
| 37 | TP-Y1 | AI | TP-Y1 | – |
| 38 | TP-Y2 | AI | TP-Y2 | – |
| 39 | GND | P | Ground | – |
| 40 | ADC | AI | ADC | – |
| 41 | USB1_P | A I/O | USB1_P | – |
| 42 | USB1_N | A I/O | USB1_N | – |
| 43 | GND | P | Ground | – |
| 44 | GND | P | Ground | – |
Extended Interface
3.1 Power connector
The Sufficient IoT Hub requires an operating voltage of 5V and an operating
current of 500mA DC. Most 5V-DC adapters with 2.1mm inner aperture plugs can
be used to drive the Sufficient IoT Hub today.
3.2 Ethernet Interface
This is a standard RJ45 Ethernet connector which facilitates your project to
access the Internet. You can connect it directly to your router or you can
connect it to your computer to share the Wi-Fi network.
3.3 Reset button
The reset button is used to reboot the board, and the most logical way to
trigger a reboot operation is in the operating system; using a hardware reboot
may corrupt the files being processed. Of course, if your system is no longer
able to respond to software commands, the reset button is the only way to
trigger a reboot.
3.4 Debugging Interface
The development board uses serial port 3 (PB6, PB7) as the debug output serial
port, the baud rate of the serial port is 115200, connect the serial port 3 to
the computer above the serial software, you can see the printout.
3.5 USB Host Port
The Sufficient IoT Hub is equipped with a USB Host port.
3.6 MicroSD card slot
Instead of a hard drive like a computer, the Sufficient IoT Hub uses a Micro
SD as a hard drive to store the operating system, programs and personal data.
System
Sufficient IoT OS is an operating system specially optimized for this product.
Based on Linux 5.4.61 Kernel, Debian10, we have made a lot of tailoring and
optimization on the operating system for the hardware platform, making it very
suitable for working with this set of hardware.
In addition, we also prepared a set of Sufficient IoT Application, make it
easier for users to operate its hardware resources. The Sufficient IoT
Application include a CLI model and a web UI model.
Typical hardware features
5.1 Physical dimensions
Resource
6.1 Relevant resource
Heltec Contact Information
Heltec Automation Technology Co., Ltd
Chengdu, Sichuan, China
Email: support@heltec.cn
Phone: +86-028-62374838
https://heltec.org
FCC Statement
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.
- 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.
To assure continued compliance, any changes or modifications not expressly
approved by the party.
Responsible for compliance could void the user’s authority to operate this
equipment. (Example- use only shielded interface cables when connecting to
computer or peripheral devices).
This equipment complies with Part 15 of the FCC Rules. Operation is subject to
the following two conditions:
- This device may not cause harmful interference, and
- This device must accept any interference received, including interference that may cause undesired operation.
FCC Radiation Exposure Statement:
The equipment complies with FCC Radiation exposure limits set forth for
uncontrolled enviroment. This equipment should be installed and operated with
minimum distance 20cm between the radiator and your body.
https://heltec.org
Heltec Automation © Limited standard files
References
- Heltec Automation – 成都惠利特自动化科技有限公司
- Heltec Automation – 成都惠利特自动化科技有限公司
- Sufficient IoT Hub – Heltec Automation
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