wayne roberts / Mbed OS lr1110_wifi_geolocation_gateway

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Dependencies:   mbed-http lr1110 sx12xx_hal

google_geolocation.cpp@1:4a05f91c9c38, 2021-02-09 (annotated)

Committer:
Wayne Roberts
Date:
Tue Feb 09 10:49:02 2021 -0800
Revision:
1:4a05f91c9c38
add source files

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Wayne Roberts 1:4a05f91c9c38 1 #include "main.h"
Wayne Roberts 1:4a05f91c9c38 2 #if (GEOLOCATION_PROVIDER == GOOGLE)
Wayne Roberts 1:4a05f91c9c38 3 #include "radio.h"
Wayne Roberts 1:4a05f91c9c38 4
Wayne Roberts 1:4a05f91c9c38 5 const char GOOGLE_SSL_CA_PEM[] = "-----BEGIN CERTIFICATE-----\n"
Wayne Roberts 1:4a05f91c9c38 6 "MIIDujCCAqKgAwIBAgILBAAAAAABD4Ym5g0wDQYJKoZIhvcNAQEFBQAwTDEgMB4G\n"
Wayne Roberts 1:4a05f91c9c38 7 "A1UECxMXR2xvYmFsU2lnbiBSb290IENBIC0gUjIxEzARBgNVBAoTCkdsb2JhbFNp\n"
Wayne Roberts 1:4a05f91c9c38 8 "Z24xEzARBgNVBAMTCkdsb2JhbFNpZ24wHhcNMDYxMjE1MDgwMDAwWhcNMjExMjE1\n"
Wayne Roberts 1:4a05f91c9c38 9 "MDgwMDAwWjBMMSAwHgYDVQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMjETMBEG\n"
Wayne Roberts 1:4a05f91c9c38 10 "A1UEChMKR2xvYmFsU2lnbjETMBEGA1UEAxMKR2xvYmFsU2lnbjCCASIwDQYJKoZI\n"
Wayne Roberts 1:4a05f91c9c38 11 "hvcNAQEBBQADggEPADCCAQoCggEBAKbPJA6+Lm8omUVCxKs+IVSbC9N/hHD6ErPL\n"
Wayne Roberts 1:4a05f91c9c38 12 "v4dfxn+G07IwXNb9rfF73OX4YJYJkhD10FPe+3t+c4isUoh7SqbKSaZeqKeMWhG8\n"
Wayne Roberts 1:4a05f91c9c38 13 "eoLrvozps6yWJQeXSpkqBy+0Hne/ig+1AnwblrjFuTosvNYSuetZfeLQBoZfXklq\n"
Wayne Roberts 1:4a05f91c9c38 14 "tTleiDTsvHgMCJiEbKjNS7SgfQx5TfC4LcshytVsW33hoCmEofnTlEnLJGKRILzd\n"
Wayne Roberts 1:4a05f91c9c38 15 "C9XZzPnqJworc5HGnRusyMvo4KD0L5CLTfuwNhv2GXqF4G3yYROIXJ/gkwpRl4pa\n"
Wayne Roberts 1:4a05f91c9c38 16 "zq+r1feqCapgvdzZX99yqWATXgAByUr6P6TqBwMhAo6CygPCm48CAwEAAaOBnDCB\n"
Wayne Roberts 1:4a05f91c9c38 17 "mTAOBgNVHQ8BAf8EBAMCAQYwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQUm+IH\n"
Wayne Roberts 1:4a05f91c9c38 18 "V2ccHsBqBt5ZtJot39wZhi4wNgYDVR0fBC8wLTAroCmgJ4YlaHR0cDovL2NybC5n\n"
Wayne Roberts 1:4a05f91c9c38 19 "bG9iYWxzaWduLm5ldC9yb290LXIyLmNybDAfBgNVHSMEGDAWgBSb4gdXZxwewGoG\n"
Wayne Roberts 1:4a05f91c9c38 20 "3lm0mi3f3BmGLjANBgkqhkiG9w0BAQUFAAOCAQEAmYFThxxol4aR7OBKuEQLq4Gs\n"
Wayne Roberts 1:4a05f91c9c38 21 "J0/WwbgcQ3izDJr86iw8bmEbTUsp9Z8FHSbBuOmDAGJFtqkIk7mpM0sYmsL4h4hO\n"
Wayne Roberts 1:4a05f91c9c38 22 "291xNBrBVNpGP+DTKqttVCL1OmLNIG+6KYnX3ZHu01yiPqFbQfXf5WRDLenVOavS\n"
Wayne Roberts 1:4a05f91c9c38 23 "ot+3i9DAgBkcRcAtjOj4LaR0VknFBbVPFd5uRHg5h6h+u/N5GJG79G+dwfCMNYxd\n"
Wayne Roberts 1:4a05f91c9c38 24 "AfvDbbnvRG15RjF+Cv6pgsH/76tuIMRQyV+dTZsXjAzlAcmgQWpzU/qlULRuJQ/7\n"
Wayne Roberts 1:4a05f91c9c38 25 "TBj0/VLZjmmx6BEP3ojY+x1J96relc8geMJgEtslQIxq/H5COEBkEveegeGTLg==\n"
Wayne Roberts 1:4a05f91c9c38 26 "-----END CERTIFICATE-----\n";
Wayne Roberts 1:4a05f91c9c38 27
Wayne Roberts 1:4a05f91c9c38 28 char my_copy[128];
Wayne Roberts 1:4a05f91c9c38 29
Wayne Roberts 1:4a05f91c9c38 30 /* parse_json: get result sent from server */
Wayne Roberts 1:4a05f91c9c38 31 void parse_json(const char *body, float *lat, float *lng, int *accuracy)
Wayne Roberts 1:4a05f91c9c38 32 {
Wayne Roberts 1:4a05f91c9c38 33 bool in_location = false;
Wayne Roberts 1:4a05f91c9c38 34 bool get_lat = false;
Wayne Roberts 1:4a05f91c9c38 35 bool get_lng = false;
Wayne Roberts 1:4a05f91c9c38 36 bool get_accuracy = false;
Wayne Roberts 1:4a05f91c9c38 37 unsigned n;
Wayne Roberts 1:4a05f91c9c38 38 strncpy(my_copy, body, sizeof(my_copy));
Wayne Roberts 1:4a05f91c9c38 39 strtok(my_copy, "\"");
Wayne Roberts 1:4a05f91c9c38 40 for (n = 0; n < 10; n++) {
Wayne Roberts 1:4a05f91c9c38 41 char *t = strtok(NULL, "\":");
Wayne Roberts 1:4a05f91c9c38 42 if (!t)
Wayne Roberts 1:4a05f91c9c38 43 break;
Wayne Roberts 1:4a05f91c9c38 44 if (in_location) {
Wayne Roberts 1:4a05f91c9c38 45 if (get_lat) {
Wayne Roberts 1:4a05f91c9c38 46 sscanf(t, "%f", lat);
Wayne Roberts 1:4a05f91c9c38 47 get_lat = false;
Wayne Roberts 1:4a05f91c9c38 48 } else if (get_lng) {
Wayne Roberts 1:4a05f91c9c38 49 sscanf(t, "%f", lng);
Wayne Roberts 1:4a05f91c9c38 50 get_lng = false;
Wayne Roberts 1:4a05f91c9c38 51 }
Wayne Roberts 1:4a05f91c9c38 52 if (strchr(t, '}'))
Wayne Roberts 1:4a05f91c9c38 53 in_location = false;
Wayne Roberts 1:4a05f91c9c38 54 else if (strcmp(t, "lat") == 0)
Wayne Roberts 1:4a05f91c9c38 55 get_lat = true;
Wayne Roberts 1:4a05f91c9c38 56 else if (strcmp(t, "lng") == 0)
Wayne Roberts 1:4a05f91c9c38 57 get_lng = true;
Wayne Roberts 1:4a05f91c9c38 58 } else {
Wayne Roberts 1:4a05f91c9c38 59 if (get_accuracy) {
Wayne Roberts 1:4a05f91c9c38 60 sscanf(t, "%d", accuracy);
Wayne Roberts 1:4a05f91c9c38 61 get_accuracy = false;
Wayne Roberts 1:4a05f91c9c38 62 }
Wayne Roberts 1:4a05f91c9c38 63 if (strcmp(t, "location") == 0)
Wayne Roberts 1:4a05f91c9c38 64 in_location = true;
Wayne Roberts 1:4a05f91c9c38 65 else if (strcmp(t, "accuracy") == 0)
Wayne Roberts 1:4a05f91c9c38 66 get_accuracy = true;
Wayne Roberts 1:4a05f91c9c38 67 }
Wayne Roberts 1:4a05f91c9c38 68 }
Wayne Roberts 1:4a05f91c9c38 69 }
Wayne Roberts 1:4a05f91c9c38 70
Wayne Roberts 1:4a05f91c9c38 71 /*
Wayne Roberts 1:4a05f91c9c38 72 * https://developers.google.com/maps/documentation/geolocation/overview
Wayne Roberts 1:4a05f91c9c38 73 */
Wayne Roberts 1:4a05f91c9c38 74 int post_scan_result(const char *body, float *lat, float *lng, int *accuracy)
Wayne Roberts 1:4a05f91c9c38 75 {
Wayne Roberts 1:4a05f91c9c38 76 HttpsRequest* post_req = new HttpsRequest(network, GOOGLE_SSL_CA_PEM, HTTP_POST, "https://www.googleapis.com/geolocation/v1/geolocate?key=YOUR-API-KEY");
Wayne Roberts 1:4a05f91c9c38 77
Wayne Roberts 1:4a05f91c9c38 78 post_req->set_header("Content-Type", "application/json");
Wayne Roberts 1:4a05f91c9c38 79
Wayne Roberts 1:4a05f91c9c38 80 HttpResponse* post_res = post_req->send(body, strlen(body));
Wayne Roberts 1:4a05f91c9c38 81 if (!post_res) {
Wayne Roberts 1:4a05f91c9c38 82 printf("HttpRequest failed (error code %d)\n", post_req->get_error());
Wayne Roberts 1:4a05f91c9c38 83 return -1;
Wayne Roberts 1:4a05f91c9c38 84 }
Wayne Roberts 1:4a05f91c9c38 85
Wayne Roberts 1:4a05f91c9c38 86 dump_response(post_res);
Wayne Roberts 1:4a05f91c9c38 87 parse_json(post_res->get_body_as_string().c_str(), lat, lng, accuracy);
Wayne Roberts 1:4a05f91c9c38 88 delete post_req;
Wayne Roberts 1:4a05f91c9c38 89
Wayne Roberts 1:4a05f91c9c38 90 return 0;
Wayne Roberts 1:4a05f91c9c38 91 }
Wayne Roberts 1:4a05f91c9c38 92
Wayne Roberts 1:4a05f91c9c38 93 void json_start()
Wayne Roberts 1:4a05f91c9c38 94 {
Wayne Roberts 1:4a05f91c9c38 95 strcpy(json, "{\"considerIp\": \"false\",");
Wayne Roberts 1:4a05f91c9c38 96 strcat(json, "\"wifiAccessPoints\": [");
Wayne Roberts 1:4a05f91c9c38 97 }
Wayne Roberts 1:4a05f91c9c38 98
Wayne Roberts 1:4a05f91c9c38 99 void json_end()
Wayne Roberts 1:4a05f91c9c38 100 {
Wayne Roberts 1:4a05f91c9c38 101 strcat(json, "]");
Wayne Roberts 1:4a05f91c9c38 102 strcat(json, "}");
Wayne Roberts 1:4a05f91c9c38 103 }
Wayne Roberts 1:4a05f91c9c38 104
Wayne Roberts 1:4a05f91c9c38 105 void wifi_result_to_json(bool first, const uint8_t *result, unsigned macStart, unsigned rssi_idx)
Wayne Roberts 1:4a05f91c9c38 106 {
Wayne Roberts 1:4a05f91c9c38 107 char str[8];
Wayne Roberts 1:4a05f91c9c38 108 unsigned i;
Wayne Roberts 1:4a05f91c9c38 109
Wayne Roberts 1:4a05f91c9c38 110 if (!first)
Wayne Roberts 1:4a05f91c9c38 111 strcat(json, ","); // end previous wifiAccessPoint
Wayne Roberts 1:4a05f91c9c38 112
Wayne Roberts 1:4a05f91c9c38 113 strcat(json, "{\"macAddress\": \"");
Wayne Roberts 1:4a05f91c9c38 114 for (i = 0; i < 6; i++) {
Wayne Roberts 1:4a05f91c9c38 115 sprintf(str, "%02x", result[i + macStart]);
Wayne Roberts 1:4a05f91c9c38 116 strcat(json, str);
Wayne Roberts 1:4a05f91c9c38 117 if (i < 5)
Wayne Roberts 1:4a05f91c9c38 118 strcat(json, ":");
Wayne Roberts 1:4a05f91c9c38 119 }
Wayne Roberts 1:4a05f91c9c38 120 strcat(json, "\",\"signalStrength\": ");
Wayne Roberts 1:4a05f91c9c38 121 sprintf(str, "%d", (int8_t)result[rssi_idx]);
Wayne Roberts 1:4a05f91c9c38 122 strcat(json, str);
Wayne Roberts 1:4a05f91c9c38 123 strcat(json, ",\"signalToNoiseRatio\": 0");
Wayne Roberts 1:4a05f91c9c38 124
Wayne Roberts 1:4a05f91c9c38 125 strcat(json, "}");
Wayne Roberts 1:4a05f91c9c38 126 }
Wayne Roberts 1:4a05f91c9c38 127
Wayne Roberts 1:4a05f91c9c38 128 #endif /* GEOLOCATION_PROVIDER == GOOGLE */