5G HUB RASPERRY PI HARWARE ATTACHED ON TOP (HAT) User Guide
- June 7, 2024
- 5G HUB
Table of Contents
RASPBERRY PI HARDWARE
ATTACHED ON TOP (HAT)
HAT Technical Specifications & User Manual
Purpose of the Document
The purpose of this document is to explain the technical specifications and manual for using the Raspberry PI HAT module.
Document History
| Version | Author | Date | Description |
|---|---|---|---|
| A | 5G HUB | 05.25.2020 | Initial Document |
Package Content
Package:
- Raspberry PI HAT for miniPCIe.
Download software:
Software can be downloaded from the following website:
https://www.5ghub.us/download
Software to download:
- QNavigatorV1.6 (in the folder \Tools).
- Quectel driver (in the folder \Driver).
Documentation:
- Quectel AT commands and GNSS commands manual (in the folder \Doc).
General Description
Overview
The Raspberry Pi (RP) model B+ can be used with add-on boards called HAT
(Hardware Attached on Top). A HAT is an add-on board for RP model B+ that
conforms to a specific set of rules that will make life easier for users and
enable the use of different hardware wireless chipsets (BG95, BG96, EG95) with
raspberry PI.
The RP HAT is a rectangular board (65x56mm) that has four mounting holes in
the (nicely rounded) corners that align with the mounting holes on the RP B+,
has a 40W GPIO header and supports the special autoconfiguration system that
allows automatic GPIO setup and driver setup. The automatic configuration is
achieved using 2 dedicated pins (ID_SD and ID_SC) on the 40W B+ GPIO header
that are reserved for an I2C EEPROM. The EEPROM holds the board manufacturer
information, GPIO setup and a thing called a “device tree” fragment –
basically a description of the attached hardware that allows Linux to
automatically load the required drivers.
- via the GPIO connector, the HAT can supply a minimum of 1.3A continuously to the Pi.
Key Features
The HAT has the following features:
- Has miniPCIe interface that can be used with BG95/BG96/EG95 wireless IoT chipsets
- Fully compatible with Raspberry Pi models that have the 40-pin GPIO header (4, 3, 2, B+, A+, Zero)
- Easy-to-use, simple setup, plug-and-play
- QMI and PPP are supported
- Clip-in Mini PCIe socket compatible with worldwide LTE/UMTS/HSPA+ and GSM/GPRS/EDGE coverage with regional or global modules which work with different frequencies & carriers
- With the 4G/LTE module (e.g Quectel EC25 and EG95) you can reach 150Mbps downlink and 50Mbps uplink data rates
- Nano USIM card socket can easily be reachable on the upside of the HAT
- Can be used standalone with PC/Laptop over micro USB, without stacking with Raspberry Pi
- The HAT can be powered from an external 5V source by exposed power pins, directly from Raspberry Pi 5V GPIO headers, via micro USB, or an optional JST connector on the bottom of the board
- Taking the module into the Airplane Mode, resetting module or RI and DTR functions can be accessible over GPIO pins
- The power of the whole board electronics can be disabled for low-power consumption use cases
- The modules (BG95, BG96, EC25, EG95) have built-in GNSS(GPS/GLONASS) receiver for geolocation applications
- Uses a GPIO connector that spaces the HAT at least 8mm from the Pi (i.e. uses spacers 8mm or larger)
- Conforms to the RP HAT requirements
- Conforms to the HAT mechanical specification
Interfaces
- miniPCIe interface
- USB 2.0 with High Speed up to 480Mbps
- Nano USIM card slot
- 40W GPIO to the raspberry PI
Software Features
The HAT does not need or has a driver. Rather The host computer (such as RPi)
needs the driver of the compatible module that will be used with the HAT. For
example, if you are using Quectel BG95/BG96/EC25/EG95 with the HAT, then your
host device should have the driver for Quectel modules. Nowadays, most of the
Linux kernel comes with the required drivers installed as a result the modules
are recognized.
The HAT is compatible with the following boards. Note that the HAT can be
connected to these boards via USB. UART communication can be work with every
device in the list easily which has 3.3V level UART port.
- Raspberry Pi 4, 3, 2, B+, A+, Zero
- Asus Tinker Board
- Rock 64
- Orange Pi
- Samsung ARTIK’s Eagleye board
- Latte Panda
General Features
- Temperature Range: -40°C ~ +80°C
- Dimensions: 65 mm x 56 mm x 9 mm
- Weight: Approx. 12g
- Supply Voltage: 3.3V – 5V.
Key Applications
- Environmental sensing and monitoring
- Traffic monitoring
- Video/Music Streaming
- Large Data Downloads and Uploads
- LTE Dongle/Router
- Mobile Internet Hotspot
- GPS Tracking
- Security & Asset tracking
- Smart city, smart building, smart transportation, and smart agriculture.
- Smart Parking
Overview Diagrams
Figure 1. HAT Top View.
Figure 2. HAT Bottom View.
40W GPIO Interface to RASPBERRY PI
miniPCIe PIN Diagram and Assignment
The HAT has miniPCIe socket. The physical connections and signal levels of the miniPCIe socket complies with PCI Express Mini Card Electromechanical Specification and has the following interfaces:
- Power supply
- (U)SIM interface
- USB interface
- UART interfaces
- PCM and I2C interfaces
- Control and indication pins
The miniPCIe socket acceptS miniPCIe cards and has the following signals:
Figure 3. miniPCIe Pin
Assignment
Pin Description
| Pin # | Pin Name | Pin Direction | Pin Functionality |
|---|---|---|---|
| J. | NC | ||
| 2 | VCC_3V3 | I | 3.0V-3.6V, typically 3.3V DC supply |
| 3 | NC | ||
| 4 | GND | Mini card ground | |
| 5 | NC | ||
| 6 | NC | Not connected | |
| 7 | RESERVED | Reserved | |
| 8 | USIM VDD | ||
| _ | 0 | Power supply for the (U)SIM card | |
| 9 | GND | ||
| io | USIM DATA | ||
| _ | I | Data signal of (U)SIM card | |
| 11 | UART_RX | I | UART receive data |
| 12 | USIM CLK | ||
| _ | 0 | Clock signal of (U)SIM card | |
| 13 | UART TX | 0 | UART transmit data |
| 14 | USIM RST | 0 | Reset signal of (U)SIM card |
| 15 | GND | ||
| --- | --- | --- | --- |
| 16 | RESERVED | ||
| 17 | RI | C | Ring indication |
| 18 | GND | ||
| 19 | RESERVED | ||
| 20 | W_DISABLE# | I | Airplane mode contra) |
| 21 | GND | ||
| 22 | PERST# | I | Fundamental reset signal |
| 23 | UART CTS | I | UART dear to send |
| 24 | RESERVED | ||
| 25 | UART RTS | 0 | UART request to send |
| 26 | GND | ||
| 27 | GND | ||
| 28 | NC | ||
| 29 | GND | ||
| 30 | I2C_SCL | OD | 12C serial dock |
| 31 | DTR | DI | Sleep mode control |
| 32 | I2C_SDA | OD | OD 12C serial data |
| 33 | RESERVED | ||
| 34 | GND | ||
| 35 | GND | ||
| 36 | USB DM | 10 | USB differential data (- ) |
| 37 | GND | ||
| 38 | USB DP | 10 | USB differential data (+) |
| 39 | VCC3V3 | ||
| _ | I | 3.0V-3.6V. typically 3.3V DC supply | |
| 40 | GND | ||
| 41 | VCC3V3 | ||
| _ | I | 3.0V-3.6V. typically 3.3V DC supply | |
| 42 | LED_WWAN# | OC | LED signal for indicating the network status of the module |
| 43 | GND | ||
| 44 | NC | (U)SIM card insertion detection | |
| 45 | PCM_CLK | CO | PCM clock signal |
| 46 | RESERVED | ||
| 47 | PCM_DOUT | 0 | PCM data output |
| 48 | NC | ||
| 49 | PCM DIN | I | PCM data input |
| SO | GND | ||
| 51 | PCM_SYNC | 10 | PCM frame synchronization |
| 52 | VCC_3V3 | PI | 3.0V-3.6V. typically 3.3V DC supply |
Raspberry PI HAT Rev 1.0
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