Connecting Two YellowJackets to Request Web Page Using Local Network —
Hardware:
- YJ Arduino board (YJ56) at ip=10.0.1.56
- Sensor Shield stacked with YJ56 for Vin power
- YJ Arduino board (YJ57) at ip=10.0.1.57
- Local network gateway 10.0.1.1
Software: WiClient YJ57 requests web page from WiServer YJ56.
- Load sketch SimpleServer_V3 (Ref: Part 4 of this series) into YJ56. Sketch uses “WiServer.init(sendMyPage);” to transmit web page content by Wifi.
- Load sketch SimpleWiClientReadWiServer_V3 into YJ57. Sketch uses GetRequest to Host: “10.0.1.56”, URL=“/“
- Result: WiServer web page is requested every 10 seconds by WiClient
- WiClient prints returned HTTP stream on Serial Monitor
/* SimpleWiClientReadWiServer_V3 * * A simple sketch that uses MRF24 WiClient to read web page from MRF24 WiServer * * Compiled with WiShield_V3 library * * Uses apps-conf.h "#define APP_WISERVER" * * Connecting Two YellowJackets for Data Transfer * * Hardware: * YJ Arduino board (YJ56) at ip=10.0.1.56 * YJ Arduino board (YJ57) at ip=10.0.1.57 * Local network gateway ip 10.0.1.1 * * Example 1: WiClient YJ57 requests web page from WiServer YJ56. * a) Load sketch SimpleWiServer_V3 into YJ56. Sketch uses * “WiServer.init(sendMyPage);” to transmit web page content by Wifi. * b) Load sketch SimpleWiClientReadWiServer_V3 into YJ57. Sketch uses * GetRequest to Host: “10.0.1.56”, URL=“/“ * c) Result: WiServer web page is requested every 10 seconds by WiClient * */ //#include <WiShield.h> #include <WiServerIO.h> #define WIRELESS_MODE_INFRA 1 #define WIRELESS_MODE_ADHOC 2 // Wireless configuration parameters ---------------------------------------- unsigned char local_ip[] = {10, 0, 1, 57}; // IP address of WiShield unsigned char gateway_ip[] = {10, 0, 1, 1}; // router or gateway IP address unsigned char subnet_mask[] = {255, 255, 255, 0}; // subnet mask for the local network const char ssid[] PROGMEM = {"Network"}; // max 32 bytes const char* myhost = "WiServer"; char* myhost_ip = "10.0.1.56"; unsigned char security_type = 3; // 0 - open; 1 - WEP; 2 - WPA; 3 - WPA2 // WPA/WPA2 passphrase const char security_passphrase[] PROGMEM = {"Network_Passcode"}; // max 64 characters // WEP 128-bit keys // sample HEX keys const uint8_t wep_keys[] PROGMEM = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, // Key 0 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Key 1 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Key 2 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // Key 3 }; // setup the wireless mode // infrastructure - connect to AP // adhoc - connect to another WiFi device unsigned char wireless_mode = WIRELESS_MODE_INFRA; unsigned char ssid_len; unsigned char security_passphrase_len; // End of wireless configuration parameters ---------------------------------------- // Function that prints data from the server void printData(char* data, int len) { // Print the data returned by the server // Note that the data is not null-terminated, may be broken up into smaller packets, and // includes the HTTP header. while (len-- > 0) { Serial.print(*(data++)); } Serial.println (" ."); // terminate messages with CR } uint8 server_ip[] = {10, 0, 1, 56}; // IP Address for WiServer YJ56 // A request that gets web page from server GETrequest getWebPage(server_ip, 80, myhost_ip, "/"); // return Hello webpage void setup() { // Enable Serial output Serial.begin(115200); Serial.println (" "); Serial.println (F("=== Initializing WiClient to display WiServer web page on Serial Monitor ===")); // Initialize WiServer (we'll pass NULL for the page serving function since we don't need to serve web pages) WiServer.init(NULL); // Ask WiServer to generate log messages (optional) WiServer.enableVerboseMode(true); // Have the processData function called when data is returned by the server getWebPage.setReturnFunc(printData); Serial.println (" "); Serial.println (F("=== WiClient is running... ===")); Serial.println (F(">>> Request response on 10 second intervals... ")); Serial.println (" "); } // Time (in millis) when the data should be retrieved unsigned long updateTime = 0; unsigned long waitTime = 1000UL * 10UL; // * UL unsigned long number format used to avoid overflow void loop() { // Check if it's time to get an update if (millis() >= updateTime) { getWebPage.submit(); // Get another update 10 seconds from now updateTime += waitTime; } // Run WiServer WiServer.server_task(); delay(10); }
Serial Monitor display output of web page request over wifi:
=== Initializing WiClient to display WiServer web page on Serial Monitor === === WiClient is running... === >>> Request response on 10 second intervals... Connected to 10.0.1.56 TX 61 bytes RX 0 bytes from 10.0.1.56 RX 83 bytes from 10.0.1.56 HTTP/1.0 200 OK <html>Hello from YellowJacket Wifi MRF24 SimpleServer_V3!</html> . Ended connection with 10.0.1.56 . Connected to 10.0.1.56 TX 61 bytes RX 0 bytes from 10.0.1.56 RX 83 bytes from 10.0.1.56 HTTP/1.0 200 OK <html>Hello from YellowJacket Wifi MRF24 SimpleServer_V3!</html> . Ended connection with 10.0.1.56
(Mar 4, 2016)
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