HAT UserManual

Table Of Contents

2 General Description

2.1 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 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.

1) via the GPIO connector the HAT can supply a minimum of 1.3A continuously to the Pi.

2.2 Key Features

The HAT has following features:

• Has miniPCIe interface 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 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 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 geo-

location 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

2.3 Interfaces

• miniPCIe interface