what this file do: Receive the data from the IP and PORT you edit.
import socket
server = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
server.bind(('192.168.1.238',65431)) #YOU NEED EDIT HERE
server.listen(5)#possible sockets up to 5.
while True:
conn,addr = server.accept()
print(conn,addr)
while True:
try:
data = conn.recv(1024)
print('recive:',data.decode())
except ConnectionResetError as e:
print('Connect is shut down！')
break
conn.close()
ipconfig or arp -a to check your device’s IP which will be the server, the port is fixed: 65431.establish an empty project in Mbed
The template of wifi is recommend.(new program->mbed-example-wifi)
You need those extra library for our specific STM32 board:
If you use example-wifi program , you can find mbed_app.json, if you use empty one, create this file.
change the content into:
{
"config": {
"wifi-shield":{
"help":"Options are internal,WIFI_IDW0XX1",
"value":"WIFI_ISM43362"
},
"wifi-ssid": {
"help": "WiFi SSID",
"value": "\"esys305-Dlink\""
},
"wifi-password": {
"help": "WiFi Password",
"value": "\"305305abcd\""
}
},
"target_overrides": {
"*": {
"platform.stdio-convert-newlines": true
}
}
}
Be aware of this SSID and Password, if you need to connect different wifi, change them.
Replace your main.cpp into:
Be aware of the function acc_server, you must change the target IP there
The data collecting and formatting are also located in acc_server
！！！the name of acc_server may be confusing , because here it actually opened a socket client
/* WiFi & Sensor
* Copyright (c) 2016 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "mbed.h"
#include "TCPSocket.h"
#include "TCPServer.h"
#include "stm32l475e_iot01_gyro.h"
#include "stm32l475e_iot01_accelero.h"
#define SCALE_MULTIPLIER 0.004
DigitalOut led(LED1);
DigitalOut errled(LED3);
WiFiInterface *wifi;
const char *sec2str(nsapi_security_t sec)
{
switch (sec) {
case NSAPI_SECURITY_NONE:
return "None";
case NSAPI_SECURITY_WEP:
return "WEP";
case NSAPI_SECURITY_WPA:
return "WPA";
case NSAPI_SECURITY_WPA2:
return "WPA2";
case NSAPI_SECURITY_WPA_WPA2:
return "WPA/WPA2";
case NSAPI_SECURITY_UNKNOWN:
default:
return "Unknown";
}
}
int scan_demo(WiFiInterface *wifi)//this function is to scan all hotspots nearby(up to 15),sometimes it will fail.
{
WiFiAccessPoint *ap;
printf("Scan:\n");
int count = wifi->scan(NULL,0);
if (count <= 0) {
printf("scan() failed with return value: %d\n", count);
return 0;
}
/* Limit number of network arbitrary to 15 */
count = count < 15 ? count : 15;
ap = new WiFiAccessPoint[count];
count = wifi->scan(ap, count);
if (count <= 0) {
printf("scan() failed with return value: %d\n", count);
return 0;
}
for (int i = 0; i < count; i++) {
printf("Network: %s secured: %s BSSID: %hhX:%hhX:%hhX:%hhx:%hhx:%hhx RSSI: %hhd Ch: %hhd\n", ap[i].get_ssid(),
sec2str(ap[i].get_security()), ap[i].get_bssid()[0], ap[i].get_bssid()[1], ap[i].get_bssid()[2],
ap[i].get_bssid()[3], ap[i].get_bssid()[4], ap[i].get_bssid()[5], ap[i].get_rssi(), ap[i].get_channel());
}
printf("%d networks available.\n", count);
delete[] ap;
return count;
}
void acc_server(NetworkInterface *net)//collect data and send via socket
{
/*
TCPServer socket;
TCPSocket* client;*/
TCPSocket socket;
//SocketAddress addr("192.168.43.176",65431);
SocketAddress addr("192.168.1.238",65431);
nsapi_error_t response;
int16_t pDataXYZ[3] = {0};
float pGyroDataXYZ[3] = {0};
char recv_buffer[9];
char acc_json[64];
int sample_num = 0;//counter
// Open a socket on the network interface, and create a TCP connection to addr
response = socket.open(net);
if (0 != response){
printf("Error opening: %d\n", response);
}
response = socket.connect(addr);
if (0 != response){
printf("Error connecting: %d\n", response);
}
socket.set_blocking(1);
while (1){
led=1;
//++sample_num; cancle the counter
BSP_ACCELERO_AccGetXYZ(pDataXYZ);
BSP_GYRO_GetXYZ(pGyroDataXYZ);
float x = pDataXYZ[0]*SCALE_MULTIPLIER, y = pDataXYZ[1]*SCALE_MULTIPLIER, z = pDataXYZ[2]*SCALE_MULTIPLIER;
float gx= pGyroDataXYZ[0]*SCALE_MULTIPLIER, gy = pGyroDataXYZ[1]*SCALE_MULTIPLIER, gz = pGyroDataXYZ[2]*SCALE_MULTIPLIER;
int len = sprintf(acc_json,"{\"x\":%f,\"y\":%f,\"z\":%f,\"gx\":%f,\"gy\":%f,\"gz\":%f,\"s\":%d}",(float)((int)(x*10000))/10000,
(float)((int)(y*10000))/10000, (float)((int)(gx*10000))/10000,(float)((int)(z*10000))/10000,(float)((int)(gy*10000))/10000,(float)((int)(gz*10000))/10000, sample_num);
response = socket.send(acc_json,len);
printf("sent %s",acc_json);
if (0 >= response){
printf("Error seding: %d\n", response);
}
wait(0.1);
led=0;
}
socket.close();
}
int main()
{
led=0;
errled=0;
float sensor_value = 0;
int16_t pDataXYZ[3] = {0};
float pGyroDataXYZ[3] = {0};
BSP_GYRO_Init();
BSP_ACCELERO_Init();
printf("init completed\n");
#ifdef MBED_MAJOR_VERSION
printf("Mbed OS version %d.%d.%d\n\n", MBED_MAJOR_VERSION, MBED_MINOR_VERSION, MBED_PATCH_VERSION);
#endif
wifi = WiFiInterface::get_default_instance();
if (!wifi) {
printf("ERROR: No WiFiInterface found.\n");
errled=1;//connect error
return -1;
}
/*
int count = scan_demo(wifi);
if (count == 0) {
printf("No WIFI APs found - can't continue further.\n");
return -1;
}*/
printf("\nConnecting to %s...\n", MBED_CONF_APP_WIFI_SSID);
int ret = wifi->connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA_WPA2);
if (ret != 0) {
printf("\nConnection error: %d\n", ret);
errled=1;//connect error
return -1;
}
printf("Success\n\n");
printf("MAC: %s\n", wifi->get_mac_address());
printf("IP: %s\n", wifi->get_ip_address());
printf("Netmask: %s\n", wifi->get_netmask());
printf("Gateway: %s\n", wifi->get_gateway());
printf("RSSI: %d\n\n", wifi->get_rssi());
acc_server(wifi);
wifi->disconnect();
}