[Kendrick] was looking for something to do with an ESP8266 WiFi module, and since he loves Bitcoin and Arduino, the obvious solution was to make a Bitcoin price tracker.
The ESP8266 is a complete microcontroller with a WiFi chip and a few pins for a serial connection. It’s certainly possible to write some firmware for the ESP to get the current conversion rate of Bitcoin, but for simplicity’s sake, [Kendrick] chose to use an Arduino for this project. He’s using a 5V Arduino, and the ESP operates on 3.3V logic, but a few Zeners take care of the logic level conversion.
The code running on the Arduino checks the CoinDesk API minute, parses the JSON coming from the API, and prints the current Bitcoin price to the serial port. For tracking the current conversion rate of Bitcoin, it’s vastly overkill. This project could have a few interesting applications, from hooking up a few seven-segment displays, to an RGB LED mood lamp that keeps track of this magic Internet money.
15 thoughts on “Tracking Bitcoin With The ESP8266”
Way to get out in front of the cries of “overkill”,[benchoff]… Nicely done!
A number of interesting possibilities come to mind as springboards off of this though.
Yes this is an awesome use! Someone was talking about this on the ESP8266 Community Forum http://www.esp8266.com need to find the link.
This is a stupid project, all this can be done inside the PC, as the arduino is just relaying over serial, if added a screen i can understand but yeah.
in about 30-40 mins just made a Java program that does just this + gives me multiple currencies(updated each time via api) my output looks like this:
but i could make a GUI if i really wanted too
No, it’s a great project. You’re burning how many watts and using how many GB to run your Java program?
To attach a LCD, all you’d need is a common backpack module and boom, the serial output is visible. Could be done with a few lines of code.
Those backpacks/LCDs are usually 5v so unfortunately not as easy to host it directly on the ESP8266…
Don’t feed the troll…
As it is it’s kind of useless. But put a 7-segment display on it and you’ve got a Bitcoin clock. If you want to display the time as well, that is. So you could have the current version of Bitcoin, or some other currency with a bit of parsing of xe.net or whatever, in your room somewhere, working without having to even start the PC. You could even have it scroll like a stock ticker, on 7-segments, spelling out “bit” and even “doge” isn’t hard. And whatever else you want, maybe stock prices.
whats this? mining on a esp8266?!
Not bad little set-up, I may have to do something like this though, and add auto buy/sell function to it too ;)
Correct me if I’m wrong, but couldn’t this be done using the ESP8266 alone programmed with the Arduino IDE? And, is it possible to add an MCP23008* to this hypothetical setup to control a character LCD? Is the ESP even equipped with the i2c device to do this?
*MCP23008 Datasheet here: http://bit.ly/1Cg0XVR
True, and Brian did state above that that could be done. You’d still need a power supply and a USBSerial cable though to get it into the host computer, that’s effectively what the Arduino is being used for here. You could of course pop the 328P chip out of the Arduino and connect TX/RX (i.e. the D0 and D1 pins) directly to the ESP8266 but then you’d still have to write new firmware for it, so all you’ve really done is move the task from one chip to the other.
What I want to know is why the host computer doesn’t just pull the quote off the web server itself… ;)
no need for arduino or wires, it’s just 5 lines of code on nodemcu – ESP8266 alone. http://nodemcu.com/index_en.html#fr_5475f7667976d8501100000f
No hardware i2c but you can do software i2c just fine. SPI version of the chip, mcp23S08, is much better if you have access to the SPI pins (no go on the esp-01).
SPI and MCP23Sxx drivers for the esp8266 are up on my github https://github.com/metalphreak
Lua on nodemcu is probably faster for most quick dev stuff.
I’ve attached an MCP23017 to ESP8266 months ago.
Just look at the ESP forum and search for Sketch_Buffet…
Hey, thanks for this post. We’ve been working on this concept for 2 years now and made a consumer-friendly version. We call it the TicrThing: your hands-free bitcoin companion.
For those who like the idea, but don’t have the time to build it yourself, you can now get this device on IndieGoGo (https://igg.me/at/ticrthing). Early supporters receive 40% off!
I’m a little late to the party, but here’s my version using MicroPython and a D1 mini
Exactly one year after our IndieGoGo campaign, our consumer-friendly crypto price ticker is available for purchase: https://www.ticrthing.com
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