写入固件计划esp32 BLE
1.把AT 指令写入 flash 区内
https://docs.espressif.com/projects/esp-idf/zh_CN/release-v4.3/esp32/api-reference/storage/nvs_flash.html
2.编写python 程序直接烧进去
https://jd3096.blog.csdn.net/article/details/121945129
ble.py,将此py文件拷贝到开发板根目录
import bluetooth
import struct
import time
from micropython import const
#ble常量设置,不用动
_IRQ_CENTRAL_CONNECT = const(1)
_IRQ_CENTRAL_DISCONNECT = const(2)
_IRQ_GATTS_WRITE = const(3)
_FLAG_READ = const(0x0002)
_FLAG_WRITE_NO_RESPONSE = const(0x0004)
_FLAG_WRITE = const(0x0008)
_FLAG_NOTIFY = const(0x0010)
_ADV_TYPE_FLAGS = const(0x01)
_ADV_TYPE_NAME = const(0x09)
_ADV_TYPE_UUID16_COMPLETE = const(0x3)
_ADV_TYPE_UUID32_COMPLETE = const(0x5)
_ADV_TYPE_UUID128_COMPLETE = const(0x7)
_ADV_TYPE_UUID16_MORE = const(0x2)
_ADV_TYPE_UUID32_MORE = const(0x4)
_ADV_TYPE_UUID128_MORE = const(0x6)
_ADV_TYPE_APPEARANCE = const(0x19)
#服务注册部分
_UART_UUID = bluetooth.UUID("6E400001-B5A3-F393-E0A9-E50E24DCCA9E")
_UART_TX = (
bluetooth.UUID("6E400003-B5A3-F393-E0A9-E50E24DCCA9E"),
_FLAG_READ | _FLAG_NOTIFY,
)
_UART_RX = (
bluetooth.UUID("6E400002-B5A3-F393-E0A9-E50E24DCCA9E"),
_FLAG_WRITE | _FLAG_WRITE_NO_RESPONSE,
)
_UART_SERVICE = (
_UART_UUID,
(_UART_TX, _UART_RX),
)
#广播函数
def advertising_payload(limited_disc=False, br_edr=False, name=None, services=None, appearance=0):
payload = bytearray()
def _append(adv_type, value):
nonlocal payload
payload += struct.pack("BB", len(value) + 1, adv_type) + value
_append(
_ADV_TYPE_FLAGS,
struct.pack("B", (0x01 if limited_disc else 0x02) + (0x18 if br_edr else 0x04)),
)
if name:
_append(_ADV_TYPE_NAME, name)
if services:
for uuid in services:
b = bytes(uuid)
if len(b) == 2:
_append(_ADV_TYPE_UUID16_COMPLETE, b)
elif len(b) == 4:
_append(_ADV_TYPE_UUID32_COMPLETE, b)
elif len(b) == 16:
_append(_ADV_TYPE_UUID128_COMPLETE, b)
if appearance:
_append(_ADV_TYPE_APPEARANCE, struct.pack("<h", appearance))
return payload
#BLE类
class BLESimplePeripheral:
def __init__(self, ble, name="mpyble"): #ble名称
self._ble = ble
self._ble.active(True)
self._ble.irq(self._irq)
((self._handle_tx, self._handle_rx),) = self._ble.gatts_register_services((_UART_SERVICE,))
self._connections = set()
self._write_callback = None
self._payload = advertising_payload(name=name)
self._advertise()
def _irq(self, event, data):
if event == _IRQ_CENTRAL_CONNECT:
conn_handle, _, _ = data
print("New connection", conn_handle)
self._connections.add(conn_handle)
self._advertise()
elif event == _IRQ_CENTRAL_DISCONNECT:
conn_handle, _, _ = data
print("Disconnected", conn_handle)
self._connections.remove(conn_handle)
self._advertise()
elif event == _IRQ_GATTS_WRITE:
conn_handle, value_handle = data
value = self._ble.gatts_read(value_handle)
if value_handle == self._handle_rx and self._write_callback:
self._write_callback(value)
def send(self, data):
for conn_handle in self._connections:
self._ble.gatts_write(21, data)
def notify(self, data):
for conn_handle in self._connections:
self._ble.gatts_notify(conn_handle,21,data)
def is_connected(self):
return len(self._connections) > 0
def _advertise(self, interval_us=500000):
print("Starting advertising")
self._ble.gap_advertise(interval_us, adv_data=self._payload)
def on_write(self, callback):
self._write_callback = callback
import ble
import bluetooth
import utime
#新建ble对象
b = bluetooth.BLE()
#导入类
p = ble.BLESimplePeripheral(b)
#查看mac地址,能正常显示mac地址就是创建广播成功
aa=b.config('mac')
print('mac地址为')
print(aa)
#接受数据函数
def on_rx(v):
print(v)
print("Receive_data:", str(v))
p.on_write(on_rx)
while 1:
if p.is_connected():
p.notify('ble data form mpy') #发送数据(以通知形式)
utime.sleep_ms(300)
#运行之后打开手机ble助手,连接即可,默认id:mpyble,可在ble.py中更改
https://doc.itprojects.cn/0006.zhishi.esp32/02.doc/index.html#/c01.ble