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OneNet_IoT_demo for ASC platform
Dependencies: Common_lib ESP8266 EdpKit_lib cJSON_lib driver_mbed_HP20x driver_mbed_TH02 wifi_example
Fork of mbed-os-example-esp8266 by
Diff: esp8266-driver/ESP8266/ESP8266.cpp
- Revision:
- 0:b887535f68bf
diff -r 000000000000 -r b887535f68bf esp8266-driver/ESP8266/ESP8266.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/esp8266-driver/ESP8266/ESP8266.cpp Thu Jan 12 20:21:45 2017 +0000 @@ -0,0 +1,306 @@ +/* ESP8266 Example + * Copyright (c) 2015 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 "ESP8266.h" + +ESP8266::ESP8266(PinName tx, PinName rx, bool debug) + : _serial(tx, rx, 1024), _parser(_serial) + , _packets(0), _packets_end(&_packets) +{ + _serial.baud(115200); + _parser.debugOn(debug); +} + +bool ESP8266::startup(int mode) +{ + //only 3 valid modes + if(mode < 1 || mode > 3) { + return false; + } + + bool success = reset() + && _parser.send("AT+CWMODE=%d", mode) + && _parser.recv("OK") + && _parser.send("AT+CIPMUX=1") + && _parser.recv("OK"); + + _parser.oob("+IPD", this, &ESP8266::_packet_handler); + + return success; +} + +bool ESP8266::reset(void) +{ + for (int i = 0; i < 2; i++) { + if (_parser.send("AT+RST") + && _parser.recv("OK\r\nready")) { + return true; + } + } + + return false; +} + +bool ESP8266::dhcp(bool enabled, int mode) +{ + //only 3 valid modes + if(mode < 0 || mode > 2) { + return false; + } + + return _parser.send("AT+CWDHCP=%d,%d", enabled?1:0, mode) + && _parser.recv("OK"); +} + +bool ESP8266::connect(const char *ap, const char *passPhrase) +{ + return _parser.send("AT+CWJAP=\"%s\",\"%s\"", ap, passPhrase) + && _parser.recv("OK"); +} + +bool ESP8266::disconnect(void) +{ + return _parser.send("AT+CWQAP") && _parser.recv("OK"); +} + +const char *ESP8266::getIPAddress(void) +{ + if (!(_parser.send("AT+CIFSR") + && _parser.recv("+CIFSR:STAIP,\"%15[^\"]\"", _ip_buffer) + && _parser.recv("OK"))) { + return 0; + } + + return _ip_buffer; +} + +const char *ESP8266::getMACAddress(void) +{ + if (!(_parser.send("AT+CIFSR") + && _parser.recv("+CIFSR:STAMAC,\"%17[^\"]\"", _mac_buffer) + && _parser.recv("OK"))) { + return 0; + } + + return _mac_buffer; +} + +const char *ESP8266::getGateway() +{ + if (!(_parser.send("AT+CIPSTA?") + && _parser.recv("+CIPSTA:gateway:\"%15[^\"]\"", _gateway_buffer) + && _parser.recv("OK"))) { + return 0; + } + + return _gateway_buffer; +} + +const char *ESP8266::getNetmask() +{ + if (!(_parser.send("AT+CIPSTA?") + && _parser.recv("+CIPSTA:netmask:\"%15[^\"]\"", _netmask_buffer) + && _parser.recv("OK"))) { + return 0; + } + + return _netmask_buffer; +} + +int8_t ESP8266::getRSSI() +{ + int8_t rssi; + char bssid[18]; + + if (!(_parser.send("AT+CWJAP?") + && _parser.recv("+CWJAP:\"%*[^\"]\",\"%17[^\"]\"", bssid) + && _parser.recv("OK"))) { + return 0; + } + + if (!(_parser.send("AT+CWLAP=\"\",\"%s\",", bssid) + && _parser.recv("+CWLAP:(%*d,\"%*[^\"]\",%hhd,", &rssi) + && _parser.recv("OK"))) { + return 0; + } + + return rssi; +} + +bool ESP8266::isConnected(void) +{ + return getIPAddress() != 0; +} + +int ESP8266::scan(WiFiAccessPoint *res, unsigned limit) +{ + unsigned cnt = 0; + nsapi_wifi_ap_t ap; + + if (!_parser.send("AT+CWLAP")) { + return NSAPI_ERROR_DEVICE_ERROR; + } + + while (recv_ap(&ap)) { + if (cnt < limit) { + res[cnt] = WiFiAccessPoint(ap); + } + + cnt++; + if (limit != 0 && cnt >= limit) { + break; + } + } + + return cnt; +} + +bool ESP8266::open(const char *type, int id, const char* addr, int port) +{ + //IDs only 0-4 + if(id > 4) { + return false; + } + + return _parser.send("AT+CIPSTART=%d,\"%s\",\"%s\",%d", id, type, addr, port) + && _parser.recv("OK"); +} + +bool ESP8266::send(int id, const void *data, uint32_t amount) +{ + //May take a second try if device is busy + for (unsigned i = 0; i < 2; i++) { + if (_parser.send("AT+CIPSEND=%d,%d", id, amount) + && _parser.recv(">") + && _parser.write((char*)data, (int)amount) >= 0) { + return true; + } + } + + return false; +} + +void ESP8266::_packet_handler() +{ + int id; + uint32_t amount; + + // parse out the packet + if (!_parser.recv(",%d,%d:", &id, &amount)) { + return; + } + + struct packet *packet = (struct packet*)malloc( + sizeof(struct packet) + amount); + if (!packet) { + return; + } + + packet->id = id; + packet->len = amount; + packet->next = 0; + + if (!(_parser.read((char*)(packet + 1), amount))) { + free(packet); + return; + } + + // append to packet list + *_packets_end = packet; + _packets_end = &packet->next; +} + +int32_t ESP8266::recv(int id, void *data, uint32_t amount) +{ + while (true) { + // check if any packets are ready for us + for (struct packet **p = &_packets; *p; p = &(*p)->next) { + if ((*p)->id == id) { + struct packet *q = *p; + + if (q->len <= amount) { // Return and remove full packet + memcpy(data, q+1, q->len); + + if (_packets_end == &(*p)->next) { + _packets_end = p; + } + *p = (*p)->next; + + uint32_t len = q->len; + free(q); + return len; + } else { // return only partial packet + memcpy(data, q+1, amount); + + q->len -= amount; + memmove(q+1, (uint8_t*)(q+1) + amount, q->len); + + return amount; + } + } + } + + // Wait for inbound packet + if (!_parser.recv("OK")) { + return -1; + } + } +} + +bool ESP8266::close(int id) +{ + //May take a second try if device is busy + for (unsigned i = 0; i < 2; i++) { + if (_parser.send("AT+CIPCLOSE=%d", id) + && _parser.recv("OK")) { + return true; + } + } + + return false; +} + +void ESP8266::setTimeout(uint32_t timeout_ms) +{ + _parser.setTimeout(timeout_ms); +} + +bool ESP8266::readable() +{ + return _serial.readable(); +} + +bool ESP8266::writeable() +{ + return _serial.writeable(); +} + +void ESP8266::attach(Callback<void()> func) +{ + _serial.attach(func); +} + +bool ESP8266::recv_ap(nsapi_wifi_ap_t *ap) +{ + int sec; + bool ret = _parser.recv("+CWLAP:(%d,\"%32[^\"]\",%hhd,\"%hhx:%hhx:%hhx:%hhx:%hhx:%hhx\",%d", &sec, ap->ssid, + &ap->rssi, &ap->bssid[0], &ap->bssid[1], &ap->bssid[2], &ap->bssid[3], &ap->bssid[4], + &ap->bssid[5], &ap->channel); + + ap->security = sec < 5 ? (nsapi_security_t)sec : NSAPI_SECURITY_UNKNOWN; + + return ret; +}