two

4g.py

@@ -109,6 +109,7 @@
 from maix import app, uart, pinmap, time
 import hashlib
 import hmac
+import re
 import ujson
 
 # ========== 配置 ==========
@@ -130,53 +131,109 @@ def generate_token(device_id):
     return "Arrow_" + hmac.new((SALT + device_id).encode(), SALT2.encode(), hashlib.sha256).hexdigest()
 
 def send_cmd(cmd_str, timeout_ms=3000):
-    """发送 AT 指令并等待 OK / ERROR"""
+    """发送 AT 指令并返回完整响应；超时返回已收到的内容。"""
     print("[AT] =>", cmd_str)
     http_serial.write((cmd_str + "\r\n").encode())
     buffer = b""
     start = time.ticks_ms()
-    while time.ticks_ms() - start < timeout_ms:
+    while time.ticks_diff(time.ticks_ms(), start) < timeout_ms:
         data = http_serial.read(128)
         if data:
             buffer += data
             try:
-                decoded = buffer.decode()
-                print("<= ", decoded.strip())
-                if "OK" in decoded:
-                    return True
-                if "+CME ERROR" in decoded or "ERROR" in decoded:
-                    return False
+                decoded = buffer.decode("utf-8", "ignore")
+                if "OK" in decoded or "+CME ERROR" in decoded or "ERROR" in decoded:
+                    print("[AT] <=", decoded.strip())
+                    return decoded
             except:
                 pass
         time.sleep_ms(10)
+    decoded = buffer.decode("utf-8", "ignore")
+    print("[AT] !! timeout", timeout_ms, "ms, response:", decoded.strip() or "<empty>")
+    return decoded
+
+
+def response_ok(response):
+    return "OK" in response and "ERROR" not in response
+
+
+def wait_modem_ready():
+    """等待模组响应，并确认 PDP 上下文已经获得 IP。"""
+    for attempt in range(15):
+        if response_ok(send_cmd("AT", 1000)):
+            break
+        print("[4G] 等待模组启动", attempt + 1, "/15")
+        time.sleep_ms(1000)
+    else:
+        print("[4G] UART2 无 AT 响应，请检查模组供电、A28/A29 接线和串口占用")
+        return False
+
+    send_cmd("ATE0", 1000)
+    cpin = send_cmd("AT+CPIN?", 3000)
+    if "READY" not in cpin:
+        print("[4G] SIM 卡未就绪:", cpin.strip())
+        return False
+
+    addr = send_cmd("AT+CGPADDR=1", 3000)
+    match = re.search(r'\+CGPADDR:\s*1,"([^\"]+)"', addr)
+    if match and match.group(1) != "0.0.0.0":
+        print("[4G] PDP ready, IP:", match.group(1))
+        return True
+
+    send_cmd("AT+MIPCALL=1,1", 15000)
+    for _ in range(20):
+        addr = send_cmd("AT+CGPADDR=1", 3000)
+        match = re.search(r'\+CGPADDR:\s*1,"([^\"]+)"', addr)
+        if match and match.group(1) != "0.0.0.0":
+            print("[4G] PDP ready, IP:", match.group(1))
+            return True
+        time.sleep_ms(1000)
+
+    print("[4G] PDP 未获得 IP，请检查 SIM 流量、信号和 APN")
     return False
 
+
+def clear_http_instances():
+    for instance_id in range(6):
+        send_cmd(f"AT+MHTTPDEL={instance_id}", 1200)
+
 def create_http_instance(url):
     cmd = f'AT+MHTTPCREATE="{url}"'
-    if send_cmd(cmd):
-        # 尝试提取 instance ID（如果模块返回）
-        # 注意：部分模块不会返回 ID，可忽略，直接用 0 或 1
-        return True
-    return False
+    response = send_cmd(cmd, 8000)
+    match = re.search(r"\+MHTTPCREATE:\s*(\d+)", response)
+    if not response_ok(response) or not match:
+        print("❌ 创建 HTTP 实例失败，模组响应:", response.strip() or "<empty>")
+        return None
+    return int(match.group(1))
 
 def send_http_request(url, api_path, token, device_id, json_data):
     # 1. 创建 HTTP 实例
-    if not create_http_instance(url):
-        print("❌ 创建 HTTP 实例失败")
+    instance_id = create_http_instance(url)
+    if instance_id is None:
         return False
 
-    # 2. 设置 Headers（假设实例 ID 为 0，或根据模块默认）
-    instance_id = 0  # 大多数模块默认实例为 0；若支持多实例，需解析返回值
-    send_cmd(f'AT+MHTTPCFG="header",{instance_id},"Content-Type: application/json"')
-    send_cmd(f'AT+MHTTPCFG="header",{instance_id},"Authorization: {token}"')
-    send_cmd(f'AT+MHTTPCFG="header",{instance_id},"DeviceId: {device_id}"')
+    # 2. 设置 Headers
+    commands = (
+        f'AT+MHTTPCFG="header",{instance_id},"Content-Type: application/json"',
+        f'AT+MHTTPCFG="header",{instance_id},"Authorization: {token}"',
+        f'AT+MHTTPCFG="header",{instance_id},"DeviceId: {device_id}"',
+    )
+    for command in commands:
+        if not response_ok(send_cmd(command)):
+            print("❌ HTTP Header 配置失败")
+            send_cmd(f"AT+MHTTPDEL={instance_id}", 2000)
+            return False
 
     # 3. 发送 Body
     json_str = ujson.dumps(json_data)
-    send_cmd(f'AT+MHTTPCONTENT={instance_id},0,0,"{json_str}"')
+    at_json = json_str.replace("\\", "\\\\").replace('"', '\\"')
+    if not response_ok(send_cmd(f'AT+MHTTPCONTENT={instance_id},0,0,"{at_json}"', 8000)):
+        print("❌ HTTP Body 配置失败")
+        send_cmd(f"AT+MHTTPDEL={instance_id}", 2000)
+        return False
 
     # 4. 发起 POST 请求
-    if send_cmd(f'AT+MHTTPREQUEST={instance_id},2,0,"{api_path}"'):
+    if response_ok(send_cmd(f'AT+MHTTPREQUEST={instance_id},2,0,"{api_path}"', 15000)):
         print("✅ HTTP 请求已发送")
         return True
     else:
@@ -199,7 +256,7 @@ def read_response(timeout_ms=5000):
 print("🚀 启动直接上传流程...")
 
 token = generate_token(device_id)
-print("🔑 Token:", token)
+print("🔑 Token 已生成:", token[:12] + "...")
 
 # 构造模拟数据
 timestamp = int(time.time() * 1000)
@@ -216,9 +273,16 @@ json_data = {
 }
 
 # 执行上传
-if send_http_request(url, api_path, token, device_id, json_data):
+upload_ok = False
+if not wait_modem_ready():
+    print("💥 4G 模组未就绪")
+else:
+    clear_http_instances()
+    upload_ok = send_http_request(url, api_path, token, device_id, json_data)
+
+if upload_ok:
     read_response()
 else:
     print("💥 上传流程失败")
 
-print("🔚 程序结束")
+print("🔚 程序结束")