我正在开发ESP8266，并且正在尝试用Lua编程。我尝试创建TCP服务器，但是在下面编写示例代码时出现错误消息名称“仅允许一个tcp服务器”。我创建了服务器，但无法关闭。
我该如何解决？
print("ESP8266 mode is: " .. wifi.getmode());
cfg = {};
-- Set the SSID of the module in AP mode and access password
cfg.ssid = "SSID";
cfg.pwd = "password";
if ssid and password then
print("ESP8266 SSID is: " .. cfg.ssid .. " and PASSWORD is: " ..
cfg.password)
end;
-- Now you should see an SSID wireless router named ESP_STATION when you scan for available WIFI networks
-- Lets connect to the module from a computer of mobile device. So, find the SSID and connect using the password selected
wifi.ap.config(cfg);
ap_mac = wifi.ap.getmac();
-- create a server on port 80 and wait for a connection, when a connection is coming in function c will be executed
sv = net.createServer(net.TCP, 30);
sv:listen(80, function(c)
c:on("receive", function(c, pl)
-- print the payload pl received from the connection
print(pl);
print(string.len(pl));
-- wait until SSID comes back and parse the SSID and the password
print(string.match(pl, "GET"));
ssid_start, ssid_end = string.find(pl, "SSID=");
if ssid_start and ssid_end then
amper1_start, amper1_end = string.find(pl, "&", ssid_end + 1);
if amper1_start and amper1_end then
http_start, http_end = string.find(pl, "HTTP/1.1", ssid_end + 1);
if http_start and http_end then
ssid = string.sub(pl, ssid_end + 1, amper1_start - 1);
password = string.sub(pl, amper1_end + 10, http_start - 2);
print("ESP8266 connecting to SSID: " .. ssid .. " with PASSWORD: " .. password);
if ssid and password then
sv:close();
-- close the server and set the module to STATION mode
wifi.setmode(wifi.STATION);
tmr.stop(2)
print("ESP8266 mode now is: " .. wifi.getmode());
-- configure the module wso it can connect to the network using the received SSID and password
wifi.sta.config(ssid, password);
print("Setting up ESP8266 for station mode…");
print("Please restart your device");
tmr.delay(10000000);
print("Mode is " .. wifi.getmode());
print("Heap:" .. node.heap())
print("");
end;
end;
end;
end;
-- this is the web page that requests the SSID and password from the user
c:send("<!DOCTYPE html> ")
c:send("<html> ")
c:send("<body> ")
c:send("<h1>ESP8266 Wireless control setup</h1>")
mac_mess1 = "The module MAC address is: " .. ap_mac
mac_mess2 = "You will need this MAC address to find the IP address of the module, please take note of it."
c:send("<h2>" .. mac_mess1 .. "</h2>")
c:send("<h2>" .. mac_mess2 .. "</h2>")
c:send("<h2>Enter SSID and Password for your WIFI router</h2>")
c:send("</form> </html>")
c:send("<form action='' method='get'>")
c:send("SSID:")
c:send("<input type='text' name='SSID' value='' maxlength='100'/>")
c:send("<br/>")
c:send("Password:")
c:send("<input type='text' name='Password' value='' maxlength='100'/>")
c:send("<input type='submit' value='Submit' />")
end);
end);
最佳答案
您需要关闭ESP8266上已运行的TCP服务器。
在创建服务器之前，请检查服务器是否已经启动，如果是，则将其关闭并创建一个新服务器。
if srv~=nil then
srv:close()
end
srv=net.createServer(net.TCP)
srv:listen(80,function(conn)
conn:on("receive",function(conn,payload)
print(payload)
conn:send("<h1> Hello, World.</h1>")
end)
end)
关于lua - 只有一台TCP服务器允许带Lua的ESP8266，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37566185/