JK-Rolling / DuinoCoinI2C

This project design to mine Duino-Coin using an ESP8266/ESP32 as a master and AVR/RP2040 as worker.

DuinoCoinI2C

This project design to mine Duino-Coin using an Esp8266/Esp32 as a master and Arduino as a slave.

Using the I2C communication to connect all the boards and make a scalable communication between the master and the slaves.

Visit youtube for video of How to Make the DuinoCoinI2C Mining Rig

Watch Programming ESP-01 video

Version

DuinoCoinI2C Version 3.3

Arduino - Slave

All Slaves have the same code and should select the I2C Address automatically if #define I2CS_FIND_ADDR is set to true

Arduino shall use DuinoCoin_RPI_Tiny_Slave sketch

RP2040 - Slave

RP2040 support dual core dual I2C. Dual core is counted as 2 workers

RP2040 shall use DuinoCoin_RPI_Pico_DualCore

Set the value below to 8 and false in the ESP and RP2040 sketch

// ESP
#define REPEATED_WIRE_SEND_COUNT 8      // 1 for AVR, 8 for RP2040

// RP2040
#define CRC8_EN false

ATTiny - Slave

ATTiny85 is tested to be working. You may try other ATTiny chip (modification maybe needed)

ATTiny shall use DuinoCoin_ATTiny_Slave

Library Dependency

• ArduinoUniqueID (Handle the chip ID)
• StreamJoin (StreamString for AVR)

Automatic I2C Address

The I2C Address on the Arduino is automatically updated when the board starts, if an Address already exists on the I2C bus the code finds another Address to use (with I2CS_FIND_ADDR enabled). However, depending on vendor, some cloned Arduino have a pretty bad random number generator. It causes it to either wait too long or clashes with each other during address assignment. So this feature is strongly NOT RECOMMENDED

Instead use manual address assignment, change the value on the define for each device (RECOMMENDED)

#define DEV_INDEX 0  // increment 1 per device
#define I2CS_START_ADDRESS 1

Esp8266/Esp32 - Master

The master requests the job on the DuinoCoin server and sends the work to the slave (Arduino).

After the job is done, the slave sends back the response to the master (Esp8266/Esp32) and then sends back to the DuinoCoin server.

Library Dependency

• ArduinoJson (Request Pool Version 2.6)
• ESPAsyncWebServer (ESPAsyncWebServer)
• ESPAsyncTCP (ESP8266)
• AsyncTCP (ESP32)

Max Client/Slave

The code supports 10 clients and can be changed on the define:

#define CLIENTS 10

Note: Community reported share rate will not improve beyond 5 slaves

AsyncWebserver

Optional. AsyncWebServer allow user to get Master status, print pool info or force switch to specific pool.

Connect to the Master via local IP address. Example address: 192.168.0.2

Link	Description
http://192.168.0.2/	show Serial monitor
http://192.168.0.2/heap	show free memory
http://192.168.0.2/clients	show connected slaves
http://192.168.0.2/printPool	print Pool address and port
http://192.168.0.2/updatePool	force refresh pool address
http://192.168.0.2/set?host=123.123.123.123&port=123	force pool address to 123.123.123.123 and port to 123
http://192.168.0.2/printMOTD	print pool message

Periodic Report

Optional. AsyncWebServer allow user to get periodic mining report via any Internet browser. e.g. Chrome/Firefox/Safari/etc

Upload data folder by using corresponding data upload tool

https://github.com/esp8266/arduino-esp8266fs-plugin

https://github.com/me-no-dev/arduino-esp32fs-plugin

Connect to the Master via local IP address. Example address: 192.168.0.2

Change reporting interval by modifying #define REPORT_INTERVAL 60000

Connection Pinouts

Connect the pins of the Esp01, Esp8266 or Esp32 on the Arduino like the table/images below, use a Logic Level Converter to connect between the ESP and Arduino.

	ESP8266	ESP32	Logic Level Converter	Arduino
	3.3V	3.3V	<--->	5V
	GND	GND	<--->	GND
SCL	D1 (GPIO5)	GPIO22	<--->	A5
SDA	D2 (GPIO4)	GPIO21	<--->	A4

ESP01

	ESP01	Logic Level Converter	Arduino
	3.3V	<--->	5V
	GND	<--->	GND
SCL	GPIO2	<--->	A5
SDA	GPIO0	<--->	A4

Uncomment #define ESP01 true

Custom PCB

ericddm shared this amazing pcb!

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