m5-stick-c-crypto-display
A tiny program to show crypto prices on M5-StickCPlus
A while ago I came across this tiny little IoT device called M5Stick. It's pretty powerful and equipped for the size and price ($20) you pay for it, Wifi, bluetooth, microphone, speaker, LCD, a built-in battery, 6-Axis IMU and, ESP32 microcontroller, three buttons and a bunch of pins for expansion.
Since I have a bunch of cyrpto coins I decided to use it as a dedicated display to monitor prices. Setting it up is easy. You can use their Burner program to transfer your code to the device. If you are on Windows (which I recommend because their macOS app is an Electron app which is terrible) you need to download CP2104 USB to UART bridge virtual COM port driver from their website.
When you open the Burner software you see this screen:
#Prepating the device to run the code
From the left pan select STICKC and from the right pan select StickC Plus. If you don't see Configuration you have to download the firmware first (hit Download). Now open the configuration window. There you have to set your wifi username and password so the device can use your wifi connection, and set the Start Mode to USB Mode to be able to run the code from the IDE on the device.
Now you need an IDE to write the code, they recommend Visual Studio code. If you go with it you need to download their extnsion so the VSCode can comunicate with the device.
You can find their official extension repo and how to use it with their devices here.
Once you have it ready you can use this code to have the price of three coins plus weather data on the display. I am using nomic API which supports multiple coins in a single call and also supports currency conversion if you like to have the prices in your local currency rather than USD.
For the weather part I am using AccuWeather. A small note on this, you can use this API to get the PLACE_KEY value for your location. In the API response it's called Key, the highlighted line in the image below:
#Code
from m5stack import *
import urequests, network, json, machine, time
from micropython import const
p1 = machine.Pin(27)
p1.init(p1.OUT)
p1.value(1)
tcounter = 0
sta_if = network.WLAN(network.STA_IF)
sta_if.active(True)
if not sta_if.isconnected():
# Set your WiFi SSID and password here
sta_if.connect('[WIFI_NAME]]', '[WIFI_PASSWORD]')
while not sta_if.isconnected():
utime.sleep(1)
lcd.clear()
# Setting the display mode to landscape
lcd.orient(lcd.LANDSCAPE)
lcd.fill(0x000000)
symbols = []
prices = []
changes = []
currentTemp = ""
currentWind = ""
currentWeather = ""
lcd.font(lcd.FONT_DejaVu24)
#Index to iterate through coins
index = 0
def getTemp():
global currentTemp
global currentWind
global currentWeather
response = urequests.get('http://dataservice.accuweather.com/currentconditions/v1/[PLACE_KEY]?apikey=[APIKEY]&details=true')
parsed = response.json()
currentTemp = str(parsed[0]["RealFeelTemperature"]["Metric"]["Value"])
currentWind = str(parsed[0]["Wind"]["Speed"]["Metric"]["Value"])
currentWeather = parsed[0]["WeatherText"]
def getPrices():
global symbols
global prices
global changes
global finalText
symbols = []
prices = []
changes = []
url = 'https://api.nomics.com/v1/currencies/ticker?key=[API_KEY]&ids=BTC,ENJ,DOGE,SHIB&interval=1h&convert=CAD&per-page=100&page=1'
response = urequests.get(url)
parsed = response.json()
for item in parsed:
symbols.append(item["name"])
_priceString = item["price"]
_price = float(item["price"])
_price = round(_price, 6)
# I want to show 6 digits after '.' if the price is smaller than 0.0009 otherwise it will show the scientific format, 4.7e-10 kind of the text
if _price > 0.0009:
prices.append(_price)
else:
prices.append('{:.6f}'.format(_price)[0:8])
_change = float(item["1h"]["price_change_pct"])
changes.append(_change)
def showData():
global index
lcd.clear()
lcd.print(symbols[index], 10, 10, 0xFFFFFF)
lcd.print('CA$'+str(prices[index]), 10, 35, 0xFFFFFF)
_percent = round(changes[index] ,4)
_percentColor = 0x0F6608
if _percent < 0:
_percentColor = 0x8B1F08
lcd.print(str(_percent)+'%', 10, 60, _percentColor)
lcd.print('______________',10,61)
lcd.print('T: '+currentTemp+ ', W: ' + currentWind , 10, 90, 0xEEEEEE)
lcd.print(currentWeather, 10, 110, 0xEEEEEE)
if index < len(symbols) - 1:
index += 1
else:
index = 0
def count(timer):
global tcounter
if tcounter & 1:
p1.value(0)
else:
p1.value(1)
tcounter += 1
# Refresh display every 5 seconds
if (tcounter % 5) == 0:
showData()
# Refresh price data every 10 minutes
if (tcounter % 600) == 0:
getPrices()
# Refresh weather data every hour
if (tcounter % 3600) == 0:
tcounter = 0
getTemp()
getPrices()
getTemp()
showData()
timer = machine.Timer(2)
timer.init(period=1000, mode=timer.PERIODIC, callback=count)In the nomic API call if you notice I have put 4 coins in front of ids and set convert to CAD to get the prices in Canadian Dollar, if you remove conver you will get them in USD. to get different coins use their website to find out which ones are supported.
On Medium: https://medium.com/@maysam.shahsavari/crypto-price-monitor-e1de14907dd5