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projects:mpu [2020/08/21 15:07]
darron [Example] 		projects:mpu [2023/07/31 18:36] (current)
darron [Examples]
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 ==== MicroPython Utility === ==== MicroPython Utility ===
  
-This utility works like a shell interpreter but pastes the content of a script into a MicroPython device on a local UART interface and displays any output from the device.+<wrap right> 
 +{{:projects:espbmp180.jpg?200|ESP-01 BMP180}} 
 +</wrap> 
 + 
 +This utility works like a shell interpreter but pastes the content of a script into a MicroPython device on a local UART interface or network address and displays any output from the device.
  
 === Install === === Install ===
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 </code> </code>
  
-=== Example ===+=== Examples ===
  
-==Script==+ 
 +==Simple==
  
 Run script directly to interpret code on MicroPython device, else invoke with python in the shell to run locally. Run script directly to interpret code on MicroPython device, else invoke with python in the shell to run locally.
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     print()     print()
 </code> </code>
- 
-==Output== 
  
 This is the output from MicroPython or python. This is the output from MicroPython or python.
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 4 Hello 4 Hello
 World! World! World! World! World! World! World! World!
 +</code>
 +
 +==Temperature==
 +
 +BMP180 attached to ESP8266 as per pictured above.
 +
 +<code>
 +#! /usr/local/bin/mpu /dev/ttyUSB1
 +
 +import sys
 +import time
 +from machine import Pin, I2C
 +from ustruct import unpack
 +
 +bus = I2C(scl=Pin(2), sda=Pin(0), freq=100000)
 +
 +try:
 +    chipid = ord(bus.readfrom_mem(119, 0xD0, 1))
 +except:
 +    print("BMP180 NOT FOUND")
 +    sys.exit()
 +
 +if (chipid != 0x55):
 +    print("BMP180 NOT DETECTED")
 +    sys.exit()
 +
 +def read(addr):
 +    W = bus.readfrom_mem(119, addr, 2)
 +    W = unpack('>h', W)
 +    W = W[0]
 +    return W
 +
 +AC1 = read(0xAA)
 +AC2 = read(0xAC)
 +AC3 = read(0xAE)
 +AC4 = read(0xB0)
 +AC5 = read(0xB2)
 +AC6 = read(0xB4)
 +B1  = read(0xB6)
 +B2  = read(0xB8)
 +MB  = read(0xBA)
 +MC  = read(0xBC)
 +MD  = read(0xBE)
 +
 +bus.writeto_mem(119, 0xF4, bytearray([0x2E]))
 +
 +time.sleep_ms(5)
 +
 +UT = read(0xF6)
 +X1 = ((UT - AC6) * AC5) / 32768
 +X2 = (MC * 2048) / (X1 + MD)
 +B5 = X1 + X2
 +T = ((B5 + 8) / 16) / 10
 +
 +print ("{} degrees centigrade".format(T))
 +</code>
 +
 +Output
 +
 +<code>
 +29.4593 degrees centigrade
 </code> </code>