uPY uart 无法与 EG25-G 正确通信
我有一个连接到 GP0 和 GP1 的电机控制器,所以我知道它们可以工作,但是我似乎无法从 SIM 控制器获得响应。如果没有将 pico 连接到板上,我可以让它工作,但是当我添加 pico 时,如果 pico 收到任何数据,它似乎不会发送 AT 命令或翻译接收到的数据。我尝试在实时会话中逐行运行代码,得到的只是一个数字,该数字等于我发送到 sim 控制器的字符串中的字母数。即 uart.write(bytearray(b'ATE1\r\n'))
将返回 >>> 6
6 是代码中b之后的字符数。我正在订购一个新的 pico,看看是否是我的焊接质量不合格,但与此同时,我可以看看是否有比我更有经验的人可以指出错误。
import machine
import os
import utime
import time
import binascii
from machine import UART
pwr_enable = 22 # EG25_4G Power key connected on GP22
uart_port = 0
uart_baud = 115200
# Initialize UART0
uart = machine.UART(uart_port, uart_baud)
print(os.uname())
def wait_resp_info(timeout=3000):
prvmills = utime.ticks_ms()
info = b""
while (utime.ticks_ms()-prvmills) < timeout:
if uart.any():
info = b"".join([info, uart.read(1)])
print(info.decode())
return info
def Check_and_start(): # Initialize SIM Module
while True:
uart.write(bytearray(b'ATE1\r\n'))
utime.sleep(10)
uart.write(bytearray(b'AT\r\n'))
rec_temp = wait_resp_info()
print(wait_resp_info())
print(rec_temp)
print(rec_temp.decode())
utime.sleep(10)
if 'OK' in rec_temp.decode():
print('OK response from AT command\r\n' + rec_temp.decode())
break
else:
power = machine.Pin(pwr_enable, machine.Pin.OUT)
power.value(1)
utime.sleep(2)
power.value(0)
print('No response, restarting\r\n')
utime.sleep(10)
def Network_check():# Network connectivity check
for i in range(1, 3):
if Send_command("AT+CGREG?", "0,1") == 1:
print('Connected\r\n')
break
else:
print('Device is NOT connected\r\n')
utime.sleep(2)
continue
def Str_to_hex_str(string):
str_bin = string.encode('utf-8')
return binascii.hexlify(str_bin).decode('utf-8')
Check_and_start()
Network_check()
响应是
>>> Check_and_start()
b''
b'\x00\x00'
No response, restarting
I had a motor controller connected to GP0 and GP1 so I know they work, however I cant seem to get a response from the SIM controller. Without the pico attached to the board, I can get it to work, but when I add the pico it seems like it wont send AT commands or translate received data if the pico is getting any at all. I have tried to run the code line by line in a live session and all I get is a single number that is equal to the number of letters inside the string that I am sending to the sim controller. ie uart.write(bytearray(b'ATE1\r\n'))
would return >>> 6
6 being the number of characters in the code after b. I'm ordering a new pico to see if just maybe it was my sub par soldering, but in the mean time I could see if anyone more experienced than I can point out a error.
import machine
import os
import utime
import time
import binascii
from machine import UART
pwr_enable = 22 # EG25_4G Power key connected on GP22
uart_port = 0
uart_baud = 115200
# Initialize UART0
uart = machine.UART(uart_port, uart_baud)
print(os.uname())
def wait_resp_info(timeout=3000):
prvmills = utime.ticks_ms()
info = b""
while (utime.ticks_ms()-prvmills) < timeout:
if uart.any():
info = b"".join([info, uart.read(1)])
print(info.decode())
return info
def Check_and_start(): # Initialize SIM Module
while True:
uart.write(bytearray(b'ATE1\r\n'))
utime.sleep(10)
uart.write(bytearray(b'AT\r\n'))
rec_temp = wait_resp_info()
print(wait_resp_info())
print(rec_temp)
print(rec_temp.decode())
utime.sleep(10)
if 'OK' in rec_temp.decode():
print('OK response from AT command\r\n' + rec_temp.decode())
break
else:
power = machine.Pin(pwr_enable, machine.Pin.OUT)
power.value(1)
utime.sleep(2)
power.value(0)
print('No response, restarting\r\n')
utime.sleep(10)
def Network_check():# Network connectivity check
for i in range(1, 3):
if Send_command("AT+CGREG?", "0,1") == 1:
print('Connected\r\n')
break
else:
print('Device is NOT connected\r\n')
utime.sleep(2)
continue
def Str_to_hex_str(string):
str_bin = string.encode('utf-8')
return binascii.hexlify(str_bin).decode('utf-8')
Check_and_start()
Network_check()
Response is
>>> Check_and_start()
b''
b'\x00\x00'
No response, restarting
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新的 Pico 解决了我的问题,我相信是我焊接技术不足造成了这个问题。症状是,没有通过 UART 引脚 0 和 1 发送或接收 UART 数据。解决方案是插入新的 Pico 板代替旧板,上传相同的代码并第一次成功运行。
New Pico fixed my issue, I believe it to be that my inadequate soldering skills created the issue. Symptoms were, no UART data was being transmitted or received through UART pins 0 and 1. Solution was new Pico board was inserted in place of old one, same code was uploaded and ran successfully first time.