The KPN SenML library helps you create and parse senml documents in both json and cbor format. The library can be used for sending sensor data and receiving actuator commands.
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Diff: senml_json_parser.cpp
- Revision:
- 0:a9259748d982
diff -r 000000000000 -r a9259748d982 senml_json_parser.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/senml_json_parser.cpp Sat May 19 17:35:20 2018 +0000 @@ -0,0 +1,140 @@ +/* _ __ ____ _ _ + * | |/ / | _ \ | \ | | + * | ' / | |_) | | \| | + * | . \ | __/ | |\ | + * |_|\_\ |_| |_| \_| + * + * (c) 2018 KPN + * License: MIT License. + * Author: Jan Bogaerts + * + * parse json + */ + +#include "senml_json_parser.h" +#include "senml_helpers.h" +#include "senml_JsonListener.h" + +#define NONE 0 +#define BN_VALUE 1 +#define BU_VALUE 2 +#define N_VALUE 3 +#define V_VALUE 4 +#define VB_VALUE 5 +#define VD_VALUE 6 +#define VS_VALUE 7 +#define BV_VALUE 8 + + +#ifdef __MBED__ + #define KEY1 key[1] +#else + #define KEY1 key.charAt(1) +#endif + + +void SenMLJsonListener::key(String key) { + //Serial.println("key: " + key); + this->expected = NONE; + if(key.length() > 0){ //using faseter char comare instead of string compare + #ifdef __MBED__ + char first = key[0]; + #else + char first = key.charAt(0); + #endif + switch (first) + { + case 'b': + if(key.length() == 2){ + switch (KEY1) + { + case 'n': this->expected = BN_VALUE; break; + case 'u': this->expected = BU_VALUE; break; + case 'v': this->expected = BV_VALUE; break; + } + } + break; + case 'n': + this->expected = N_VALUE; break; + case 'v': + if(key.length() == 2){ + switch (KEY1) + { + case 'b': this->expected = VB_VALUE; break; + case 'd': this->expected = VD_VALUE; break; + case 's': this->expected = VS_VALUE; break; + } + } + else if(key.length() == 1) + this->expected = V_VALUE; + break; + } + } + +} + +void SenMLJsonListener::value(String value) { + double dblVal; + bool boolVal; + switch (this->expected) + { + case BV_VALUE: this->baseValue = atof(value.c_str()); + case BN_VALUE: this->setCurrentPack(value); break; + case BU_VALUE: this->checkBaseUnit(value); break; + case N_VALUE: this->setCurrentRecord(value); break; + case V_VALUE: + dblVal = atof(value.c_str()) + this->baseValue; + this->setValue(&dblVal, sizeof(double), SENML_TYPE_NR); + break; + case VB_VALUE: + boolVal = strcmp(value.c_str(), "true") == 0; + this->setValue(&boolVal, sizeof(bool), SENML_TYPE_BOOL); + break; + case VD_VALUE: this->setValue(value.c_str(), value.length(), SENML_TYPE_DATA); break; + case VS_VALUE: this->setValue(value.c_str(), value.length(), SENML_TYPE_STRING); break; + } +} + +void SenMLJsonListener::setValue(const void* value, int length, SenMLDataType dataType) +{ + if(this->curRec){ + this->curRec->actuate(value, length, dataType); + } + else { + SenMLPack* pack = this->curPack; + if(!pack) + pack = this->root; + if(pack) + pack->actuate(this->curPackName.c_str(), this->curRecName.c_str(), value, length, dataType); + } +} + +/* + +void SenMLJsonListener::startDocument() { + Serial.println("start document"); +} + +void SenMLJsonListener::endArray() { + Serial.println("end array. "); +} + +void SenMLJsonListener::endDocument() { + Serial.println("end document. "); +} + +void SenMLJsonListener::startArray() { + Serial.println("start array. "); +} + +void SenMLJsonListener::startObject() { + Serial.println("start object. "); +} +*/ + + + + + + +