nodemcu

问题 I'm having an issue with connecting the esp module on the raspberry via mqtt . After a lot of search I think I am kinda lost now. So here's the problem I have setup my raspberry's local dns to work as cubex.local, I followed the instructions here: http://www.howtogeek.com/167190/how-and-why-to-assign-the-.local-domain-to-your-raspberry-pi/ Everything seems to be working fine on this end... I can use the cubex.local on the local network to have ssh and ftp access to the raspberry but when it

问题 I have tried a blink on the NodeMCU working ok, but when doing basic connection to WiFi I get this error: init.lua:4: attempt to concatenate global 'gw' (a nil value) this is the connection wifi.setmode(wifi.STATION) wifi.sta.config("wifi-name","password") ip, nm, gw=wifi.sta.getip() print("\nIP Info:\nIP Address: "..ip.." \nNetmask: "..nm.." \nGateway Addr: "..gw.."\n") 回答1: With NodeMCU many functions are asynchronous (assume this to be the default). Hence, calling wifi.sta.config isn't

问题 I'm using a NodeMCU board, V3 pinout, and the Arduino IDE. I need to oscillate one of the output pins, and digging around I found this page: https://github.com/nodemcu/nodemcu-firmware/blob/master/docs/en/modules/gpio.md Very useful, especially the gpio.serout() function, but I can't get it to work. This is my code: #include <gpio.h>; #define LED D5 void setup() { gpio.mode(LED, OUTPUT); Serial.begin(9600); } void loop() { Serial.write("Starting blinking."); gpio.serout(LED, HIGH, 1000000, 10

问题 I'm building a battery powered IoT device based on ESP8266 with NodeMCU. I use mqtt to periodically perform measurements and publish results. I know, that to allow network stack running, I should avoid tight loops and rely on callback functions. Therefore it seemed to me that the right organization of my measurement code should be: interval=60000000 function sleep_till_next_sample() node.dsleep(interval) end function close_after_sending() m:close() sleep_till_next_sample() end function

问题 I'm trying to create a local http server on ESP8266 with lua using NodeMCU custom build by frightanic.com. When i create a local http server along with a connection that is already listening on port 80 and fetching data from my server site, it is giving me PANIC error. Here's my code : wifi.setmode(wifi.STATION) wifi.sta.config("SSID","password") wifi.sta.connect() tmr.alarm(1,10000, 1, function() if (wifi.sta.getip() == nil) then print("IP unavaiable, Waiting...") else foo() local_server()

问题 I am trying to acquire rs232 data from a device connected to the ESP8266 (data will then be sent our via http/wifi). I am using max3232 IC to provide the necessary 3.3v TTL to the ESP8266. I have have connected the max3232 (pin 12) to GPIO pin 13 (rx) on the ESP8266 (I am only receiving data not sending data, so only the rx pin is connected). The code i am using: -- --file: test2.lua -- tst2 = require "tst2" tst2.start() --tst2.lua (testing script) local module = {} function module.start()

问题 I'm using esp8266 with the firmware produced with Marcel's NodeMCU custom builds http://frightanic.com/nodemcu-custom-build/ I tested the "dev" branch and the "master". I changed a little bit the " Connect to MQTT Broker " code found here https://github.com/nodemcu/nodemcu-firmware -- init mqtt client with keepalive timer 120sec m = mqtt.Client("clientid", 120, "user", "password") m:on("connect", function(con) print ("connected") end) m:on("offline", function(con) print ("offline") end) -- m

问题 I have a problem with the following Lua code on an ESP8266... function sendData(humidity,temperature) -- Setup MQTT client and events print("sendData() entered") print("Setting up mqtt.Client...") m = mqtt.Client(mqtt_client_id, 120, username, password) print("Attempting client connect...") m:connect(mqtt_broker_ip , mqtt_broker_port, 0, function(conn) print("Connected to MQTT") print(" IP: " .. mqtt_broker_ip) print(" Port: " .. mqtt_broker_port) print(" Client ID: " .. mqtt_client_id) print

问题 My sensor is collecting data correctly but is not pushing the data to Firebase. As expected Firebase.failed returns true but Firebase.error is empty. Please help me with the code as my project is due in three days. I have tried changing the fingerprint in FirebaseHttpClient.h file. I have also tried changing the Firebase HOST with and without "/". #include "DHT.h" #include <FirebaseArduino.h> #include <ESP8266WiFi.h> #define FIREBASE_HOST "your-project.firebaseio.com" #define FIREBASE_AUTH

问题 hello everybody:) I built a firmware with cloud build service. The firmware is master and includes "adc, file, gpio, http, mqtt, net, node, ow, spi, tmr, uart, wifi" and also supports SSL. Using ESP 07 and the previous version of firmware was nodeMCU 0.9.6 and that was correctly worked but didn't support some modules that i need. To flash the firmware, i use NodeMCU flasher with these setting: flasher setting I upload the binary firmware file to address 0x00000 and esp_init_data_default.bin