1 | /*
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2 | The MIT License (MIT)
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3 |
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4 | Copyright (c) 2015 Technical Rockstars
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5 | Copyright (C) 2015 Embedded and Real-Time Systems Laboratory
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6 | Graduate School of Information Science, Nagoya Univ., JAPAN
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7 | Permission is hereby granted, free of charge, to any person obtaining a copy
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8 | of this software and associated documentation files (the "Software"), to deal
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9 | in the Software without restriction, including without limitation the rights
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10 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 | copies of the Software, and to permit persons to whom the Software is
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12 | furnished to do so, subject to the following conditions:
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13 |
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14 | The above copyright notice and this permission notice shall be included in all
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15 | copies or substantial portions of the Software.
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16 |
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17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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23 | SOFTWARE.
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24 | */
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25 | #include "Milkcocoa.h"
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26 | #include "stdio.h"
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27 |
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28 |
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29 | DataElement::DataElement() {
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30 | params = aJson.createObject();
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31 | paJsonObj = aJson.createObject();
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32 | aJson.addItemToObject(paJsonObj, "params", params);
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33 | }
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34 |
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35 | DataElement::DataElement(char *json_string) {
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36 | paJsonObj = aJson.parse(json_string);
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37 | params = aJson.getObjectItem(paJsonObj, "params");
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38 | }
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39 |
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40 | DataElement::~DataElement() {
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41 | aJson.deleteItem(paJsonObj);
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42 | paJsonObj = NULL;
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43 | params = NULL;
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44 | }
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45 |
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46 | void DataElement::setValue(const char *key, const char *v) {
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47 | aJson.addStringToObject(params, key, v);
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48 | }
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49 |
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50 | void DataElement::setValue(const char *key, int v) {
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51 | aJson.addNumberToObject(params, key, v);
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52 | }
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53 |
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54 | void DataElement::setValue(const char *key, double v) {
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55 | aJson.addNumberToObject(params, key, v);
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56 | }
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57 |
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58 | char *DataElement::getString(const char *key) {
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59 | aJsonObject* obj = aJson.getObjectItem(params, key);
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60 | return obj->valuestring;
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61 | }
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62 |
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63 | int DataElement::getInt(const char *key) {
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64 | aJsonObject* obj = aJson.getObjectItem(params, key);
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65 | if(obj == NULL)
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66 | Serial.println("obj is NULL");
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67 | return obj->valueint;
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68 | }
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69 |
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70 | float DataElement::getFloat(const char *key) {
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71 | aJsonObject* obj = aJson.getObjectItem(params, key);
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72 | return obj->valuefloat;
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73 | }
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74 |
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75 |
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76 | char *DataElement::toCharArray() {
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77 | return aJson.print(paJsonObj);
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78 | }
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79 |
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80 | Milkcocoa::Milkcocoa(Client *client, const char *host, uint16_t port, const char *_app_id, const char *client_id) {
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81 | app_id = _app_id;
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82 | mqtt = new Adafruit_MQTT_Client(client, host, port, client_id, "sdammy", app_id);
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83 |
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84 | for (uint8_t i=0; i<MILKCOCOA_SUBSCRIBERS; i++) {
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85 | milkcocoaSubscribers[i] = 0;
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86 | }
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87 |
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88 | }
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89 |
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90 | Milkcocoa::Milkcocoa(Client *client, const char *host, uint16_t port, const char *_app_id, const char *client_id, const char *_session) {
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91 | sprintf(session, "%s", _session);
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92 | app_id = _app_id;
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93 | mqtt = new Adafruit_MQTT_Client(client, host, port, client_id, session, app_id);
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94 |
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95 | for (uint8_t i=0; i<MILKCOCOA_SUBSCRIBERS; i++) {
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96 | milkcocoaSubscribers[i] = 0;
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97 | }
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98 |
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99 | }
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100 |
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101 | Milkcocoa* Milkcocoa::createWithApiKey(Client *client, const char *host, uint16_t port, const char *app_id, const char *client_id, const char *key, const char *secret)
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102 | {
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103 | char session[60];
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104 | sprintf(session, "k%s:%s", key, secret);
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105 | return new Milkcocoa(client, host, port, app_id, client_id, session);
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106 | }
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107 |
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108 | void Milkcocoa::connect() {
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109 | int ret;
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110 |
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111 | if (mqtt->connected()) {
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112 | return;
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113 | }
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114 |
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115 | Serial.print("Connecting to MQTT... ");
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116 |
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117 | while ((ret = mqtt->connect()) != 0) { // connect will return 0 for connected
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118 | Serial.println(mqtt->connectErrorString(ret));
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119 | Serial.println(ret);
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120 | Serial.println("Retrying MQTT connection in 5 seconds...");
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121 | mqtt->disconnect();
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122 | delay(5000); // wait 5 seconds
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123 | }
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124 | Serial.println("MQTT Connected!");
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125 | }
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126 |
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127 | bool Milkcocoa::push(const char *path, DataElement *pdataelement) {
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128 | char topic[100];
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129 | bool ret;
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130 | char *send_array;
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131 | sprintf(topic, "%s/%s/push", app_id, path);
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132 | Adafruit_MQTT_Publish pushPublisher = Adafruit_MQTT_Publish(mqtt, topic);
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133 | send_array = pdataelement->toCharArray();
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134 | ret = pushPublisher.publish(send_array);
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135 | free(send_array);
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136 | return ret;
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137 | }
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138 |
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139 | bool Milkcocoa::send(const char *path, DataElement *pdataelement) {
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140 | char topic[100];
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141 | bool ret;
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142 | char *send_array;
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143 | sprintf(topic, "%s/%s/send", app_id, path);
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144 | Adafruit_MQTT_Publish pushPublisher = Adafruit_MQTT_Publish(mqtt, topic);
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145 | send_array = pdataelement->toCharArray();
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146 | ret = pushPublisher.publish(send_array);
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147 | free(send_array);
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148 | return ret;
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149 | }
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150 |
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151 | void Milkcocoa::loop() {
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152 | connect();
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153 | Adafruit_MQTT_Subscribe *subscription;
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154 | while ((subscription = mqtt->readSubscription(1000))) {
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155 | for (uint8_t i=0; i<MILKCOCOA_SUBSCRIBERS; i++) {
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156 | if(milkcocoaSubscribers[i] == 0) continue;
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157 | if (subscription == (milkcocoaSubscribers[i]->mqtt_sub) ) {
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158 | DataElement de = DataElement((char *)milkcocoaSubscribers[i]->mqtt_sub->lastread);
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159 | milkcocoaSubscribers[i]->cb( &de );
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160 | }
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161 | }
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162 | }
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163 | }
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164 |
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165 | bool Milkcocoa::on(const char *path, const char *event, GeneralFunction cb) {
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166 | MilkcocoaSubscriber *sub = new MilkcocoaSubscriber(cb);
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167 | sprintf(sub->topic, "%s/%s/%s", app_id, path, event);
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168 |
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169 | uint8_t i;
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170 | Adafruit_MQTT_Subscribe *mqtt_sub = new Adafruit_MQTT_Subscribe(mqtt, sub->topic);
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171 | sub->set_mqtt_sub(mqtt_sub);
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172 | if(!mqtt->subscribe(mqtt_sub)) {
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173 | return false;
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174 | }
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175 | for (i=0; i<MILKCOCOA_SUBSCRIBERS; i++) {
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176 | if (milkcocoaSubscribers[i] == sub) {
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177 | return false;
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178 | }
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179 | }
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180 | for (i=0; i<MILKCOCOA_SUBSCRIBERS; i++) {
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181 | if (milkcocoaSubscribers[i] == 0) {
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182 | milkcocoaSubscribers[i] = sub;
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183 | return true;
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184 | }
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185 | }
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186 | return false;
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187 | }
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188 |
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189 | MilkcocoaSubscriber::MilkcocoaSubscriber(GeneralFunction _cb) {
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190 | cb = _cb;
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191 | }
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192 |
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193 | void MilkcocoaSubscriber::set_mqtt_sub(Adafruit_MQTT_Subscribe *_mqtt_sub) {
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194 | mqtt_sub = _mqtt_sub;
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195 | }
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196 |
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197 |
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