Wiki source code of NodeMCU

Version 4.1 by Leon Poon on 2021/01/20 14:15
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1 Nodemcu V3 Lua WiFi module integrated ESP8266 + additional memory 32Mbit FLASH, USB serial port CP2102
2
3 {{code language="ini" title="platformio.ini"}}
4 [env:nodemcuv2]
5 platform = espressif8266
6 board = nodemcuv2
7 framework = arduino
8 lib_deps = arduino-libraries/NTPClient@^3.1.0
9
10 {{/code}}
11
12 Blink all GPIO pin and NTP (uses [[https:~~/~~/platformio.org/lib/show/551/NTPClient/>>https://platformio.org/lib/show/551/NTPClient/]]):
13
14 {{code language="c++" title="main.cpp"}}
15 #include <Arduino.h>
16 #include <ESP8266WiFi.h>
17 #include <WiFiUdp.h>
18 #include <NTPClient.h>
19 const char *ssid = "<ssid>";
20 const char *password = "<wpa_password>";
21
22 WiFiUDP ntpUDP;
23
24 NTPClient timeClient(ntpUDP, "ntp-b.nist.gov", 0, 60000);
25
26
27 void setup() {
28 for (uint8_t i = 0; i <= 5; i++)
29 pinMode(i, OUTPUT);
30 for (uint8_t i = 12; i <= 16; i++)
31 pinMode(i, OUTPUT);
32
33 // Serial.begin(115200);
34
35 WiFi.begin(ssid, password);
36
37 while ( WiFi.status() != WL_CONNECTED ) {
38 delay ( 500 );
39 // Serial.print ( "." );
40 }
41
42
43 timeClient.begin();
44 }
45
46
47 unsigned long t;
48
49
50 void f(uint8_t hl) {
51 timeClient.update();
52 unsigned long t1;
53 for (; (t1 = timeClient.getEpochTime()) == t; delay(1));
54
55 t = t1;
56 // Serial.println(timeClient.getFormattedTime());
57
58 for (uint8_t i = 0; i <= 5; i++)
59 digitalWrite(i, hl);
60 for (uint8_t i = 12; i <= 16; i++)
61 digitalWrite(i, hl);
62 }
63
64 void loop() {
65 f(HIGH);
66 f(LOW);
67 }
68
69 {{/code}}
70
71 {{code language="none" title="Upload log"}}
72 Configuring upload protocol...
73 AVAILABLE: espota, esptool
74 CURRENT: upload_protocol = esptool
75 Looking for upload port...
76 Auto-detected: /dev/ttyUSB0
77 Uploading .pio/build/nodemcuv2/firmware.bin
78 esptool.py v2.8
79 Serial port /dev/ttyUSB0
80 Connecting....
81 Chip is ESP8266EX
82 Features: WiFi
83 Crystal is 26MHz
84 MAC: AA:BB:CC:DD:EE:FF
85 Uploading stub...
86 Running stub...
87 Stub running...
88 Configuring flash size...
89 Auto-detected Flash size: 4MB
90 Compressed 269888 bytes to 199316...
91
92 Writing at 0x00000000... (7 %)
93 Writing at 0x00004000... (15 %)
94 Writing at 0x00008000... (23 %)
95 Writing at 0x0000c000... (30 %)
96 Writing at 0x00010000... (38 %)
97 Writing at 0x00014000... (46 %)
98 Writing at 0x00018000... (53 %)
99 Writing at 0x0001c000... (61 %)
100 Writing at 0x00020000... (69 %)
101 Writing at 0x00024000... (76 %)
102 Writing at 0x00028000... (84 %)
103 Writing at 0x0002c000... (92 %)
104 Writing at 0x00030000... (100 %)
105 Wrote 269888 bytes (199316 compressed) at 0x00000000 in 17.6 seconds (effective 122.6 kbit/s)...
106 Hash of data verified.
107
108 Leaving...
109 Hard resetting via RTS pin...
110 {{/code}}
111
112 {{gallery}}
113 image:front.jpg
114
115 image:back.jpg
116 {{/gallery}}