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espBerry - ESP32 Extended Functionality through Raspberry Pi HATs
The espBerry DevBoard combines the ESP32-DevKitC development board with any Raspberry Pi HAT by connecting to the onboard RPi-compatible 40-pin GPIO header. The purpose of the espBerry should not be perceived as a Raspberry Pi alternative but as extending the ESP32’s functionality by tapping into the vast offerings of RPi HATs in the market and taking advantage of the multiple and flexible hardware options. The espBerry is the perfect solution for Internet of Things (IoT) applications, especially those requiring wireless capabilities. All open-source code samples take advantage of the popular Arduino IDE with its excellent programming capabilities.
Unleash the powerful ESP32 hardware capabilities to easily connect two CAN ports to Bluetooth, BLE, WiFi, USB, etc.
espBerry Features
- Processor: ESP32 DevKitC
- 32-Bit Xtensa dual-core @240 MHz
- WiFi IEEE 802.11 b/g/n 2.4 GHz
- Bluetooth 4.2 BR/EDR and BLE
- 520 kB SRAM (16 kB for cache)
- 448 kB ROM
- Programmable per USB A/micro-USB B cable
- Raspberry Pi Compatible 40-pin GPIO header
- 20 GPIO
- 2 x SPI
- 1 x UART
- Input Power: 5 VDC
- Reverse polarity protection
- Overvoltage Protection
- Power Barrel Connector Jack 2.00mm ID (0.079″), 5.50mm OD (0.217″)
- 12/24 VDC options available
- Operating Range: -40°C ~ 85°C
Note: Most RPi HATs operate at 0°C ~ 50°C - Dimensions: 95 mm x 56 mm – 3.75″ x 2.2″
Complies to Standard Raspberry Pi HAT Mechanical Specifications…
PICAN-M - NMEA 0183 & NMEA 2000 HAT
Features
- CAN Bus connection via Micro-C connector
- 120 Ω terminator ready
- NMEA 0183 (RS422) via 5-way screw terminal
- LED indicator (GPIO22)
- Qwiic (I2C) connector for extra sensors
- Option: 3A Switch Mode Power Supply (SMPS)
NMEA 2000 Software
For the NMEA 2000 (CAN Bus) port, we are using a modified version of the MCP_CAN Library for Arduino by Cory Fowler. The modifications were applied to match CE0 and INT0 signals. Please refer to the library information to perform functionality such as loopback, sleep, etc.
See our post describing the ESP32 Sketch: espBerry with NMEA 2000 & NMEA 0183 HAT...
NMEA 0183 Software
The PICAN-M HAT converts the NMEA 0183 signal to TTL (UART) ,which connects to the ESP32 Tx and RX signals.
See our post describing the ESP32 Sketch: espBerry with NMEA 2000 & NMEA 0183 HAT...
Power Source Jumper
The PICAN-M with SMPS allows to supply external power (12 VDC) directly to the HAT. When powering the espBerry through this external power supply, you need to set the jumper at the Power Source Selector to “EXT.” Otherwise, it must set to “On Board.” It is possible to power the espBerry internally (“On Board”) while still having the external power applied to the HAT.
Power Source Jumper without SMPS
Power Source Jumper with SMPS
Application Examples
- NMEA 0183 to SAE J1939 Gateway - In Preparation...
- NMEA 2000 to USB Gateway - In Preparation...
- NMEA 2000 to Bluetooth Gateway - In Preparation...
More Resources
- espBerry Data Sheet (PDF)…
- espBerry User Manual (PDF)...
- NMEA 2000 & NMEA 0183 Bus HAT - Schematics (PDF)...
Development Resources
Programming Support
Bluetooth & BLE Information
- Adafruit - Bluetooth & BTLE...
- Exploring Bluetooth 5 - Going the Distance...
- The Basics of Bluetooth Low Energy (BLE)...
- Understanding Bluetooth Range...
Electronics Projects with the ESP8266 and ESP32: Building Web Pages, Applications, and WiFi Enabled Devices
Copperhill Technologies highly recommends using this book for your wireless application projects. Yes, many good books and free online resources are available these days, but this is the book we are using. It made our approach to Bluetooth, BLE, and WIFI a breeze. Programming wireless applications without hassles was fun, and we will share them on this web page.
Projects throughout the book utilize the wireless functionality and processing power of the ESP microcontrollers. Projects are built in the Arduino IDE, so you don't need to download other programming software. In addition, mobile apps are now ubiquitous, making the app build projects of the book very relevant, as are the web page design projects.
In Electronics Projects with the ESP8266 and ESP32, you'll see how easy and practical it is to access information over the internet, develop web pages, build mobile apps to remotely control devices with speech recognition, or incorporate Google Maps in a GPS route tracking app.
