![](/media/cache/group/Advantech_logo.jpg.50x50_q85.jpg)
Generic Pelion Device Management example for various Advantech modules.
This example is known to work great on the following platforms:
- WISE-1530 WiFi Module using DB-1505 carrier board and external SD card reader.
Example Functionality
This example showcases the following device functionality:
- On timer button increment, simulate Pelion LWM2M button resource change
Use this example with Mbed CLI
1. Import the application into your desktop:
mbed import https://os.mbed.com/teams/Advantech/code/pelion-example-common cd pelion-example-common
2. Download your developer certificate from pelion portal
3. Compile the program
mbed compile -t <toolchain> -m <TARGET_BOARD>
(supported toolchains : GCC_ARM / ARM / IAR)
4. Copy the binary file pelion-example-common.bin to your mbed device.
Diff: drivers/network/COMPONENT_WIFI_ESP32/ESP32Stack.cpp
- Revision:
- 0:43ff9e3bc244
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/drivers/network/COMPONENT_WIFI_ESP32/ESP32Stack.cpp Tue Mar 12 13:48:39 2019 +0800 @@ -0,0 +1,327 @@ +/* ESP32 implementation of NetworkInterfaceAPI + * Copyright (c) 2015 ARM Limited + * Copyright (c) 2017 Renesas Electronics Corporation + * + * 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 <string.h> +#include "ESP32Stack.h" + +// ESP32Stack implementation +ESP32Stack::ESP32Stack(PinName en, PinName io0, PinName tx, PinName rx, bool debug, + PinName rts, PinName cts, int baudrate) +{ + _esp = ESP32::getESP32Inst(en, io0, tx, rx, debug, rts, cts, baudrate); + memset(_local_ports, 0, sizeof(_local_ports)); +} + +struct esp32_socket { + int id; + nsapi_protocol_t proto; + bool connected; + SocketAddress addr; + int keepalive; // TCP + bool accept_id; + bool tcp_server; +}; + +int ESP32Stack::socket_open(void **handle, nsapi_protocol_t proto) +{ + // Look for an unused socket + int id = _esp->get_free_id(); + + if (id == -1) { + return NSAPI_ERROR_NO_SOCKET; + } + + struct esp32_socket *socket = new struct esp32_socket; + if (!socket) { + return NSAPI_ERROR_NO_SOCKET; + } + + socket->id = id; + socket->proto = proto; + socket->connected = false; + socket->keepalive = 0; + socket->accept_id = false; + socket->tcp_server = false; + *handle = socket; + return 0; +} + +int ESP32Stack::socket_close(void *handle) +{ + struct esp32_socket *socket = (struct esp32_socket *)handle; + int err = 0; + + if (!socket) { + return NSAPI_ERROR_NO_SOCKET; + } + + if (!_esp->close(socket->id, socket->accept_id)) { + err = NSAPI_ERROR_DEVICE_ERROR; + } + + if (socket->tcp_server) { + _esp->del_server(); + } + _local_ports[socket->id] = 0; + + delete socket; + return err; +} + +int ESP32Stack::socket_bind(void *handle, const SocketAddress &address) +{ + struct esp32_socket *socket = (struct esp32_socket *)handle; + + if (!socket) { + return NSAPI_ERROR_NO_SOCKET; + } + + if (socket->proto == NSAPI_UDP) { + if(address.get_addr().version != NSAPI_UNSPEC) { + return NSAPI_ERROR_UNSUPPORTED; + } + + for(int id = 0; id < ESP32::SOCKET_COUNT; id++) { + if(_local_ports[id] == address.get_port() && id != socket->id) { // Port already reserved by another socket + return NSAPI_ERROR_PARAMETER; + } else if (id == socket->id && socket->connected) { + return NSAPI_ERROR_PARAMETER; + } + } + _local_ports[socket->id] = address.get_port(); + return 0; + } + + socket->addr = address; + return 0; +} + +int ESP32Stack::socket_listen(void *handle, int backlog) +{ + struct esp32_socket *socket = (struct esp32_socket *)handle; + + (void)backlog; + + if (!socket) { + return NSAPI_ERROR_NO_SOCKET; + } + + if (socket->proto != NSAPI_TCP) { + return NSAPI_ERROR_UNSUPPORTED; + } + + if (!_esp->cre_server(socket->addr.get_port())) { + return NSAPI_ERROR_DEVICE_ERROR; + } + + socket->tcp_server = true; + return 0; +} + +int ESP32Stack::socket_connect(void *handle, const SocketAddress &addr) +{ + struct esp32_socket *socket = (struct esp32_socket *)handle; + + if (!socket) { + return NSAPI_ERROR_NO_SOCKET; + } + + if (socket->proto == NSAPI_UDP) { + if (!_esp->open("UDP", socket->id, addr.get_ip_address(), addr.get_port(), _local_ports[socket->id])) { + return NSAPI_ERROR_DEVICE_ERROR; + } + } else { + if (!_esp->open("TCP", socket->id, addr.get_ip_address(), addr.get_port(), socket->keepalive)) { + return NSAPI_ERROR_DEVICE_ERROR; + } + } + + socket->connected = true; + return 0; +} + +int ESP32Stack::socket_accept(void *server, void **socket, SocketAddress *addr) +{ + struct esp32_socket *socket_new = new struct esp32_socket; + int id; + + if (!socket_new) { + return NSAPI_ERROR_NO_SOCKET; + } + + if (!_esp->accept(&id)) { + delete socket_new; + return NSAPI_ERROR_NO_SOCKET; + } + + socket_new->id = id; + socket_new->proto = NSAPI_TCP; + socket_new->connected = true; + socket_new->accept_id = true; + socket_new->tcp_server = false; + *socket = socket_new; + + return 0; +} + +int ESP32Stack::socket_send(void *handle, const void *data, unsigned size) +{ + struct esp32_socket *socket = (struct esp32_socket *)handle; + + if (!socket) { + return NSAPI_ERROR_NO_SOCKET; + } + + if (!_esp->send(socket->id, data, size)) { + return NSAPI_ERROR_DEVICE_ERROR; + } + + return size; +} + +int ESP32Stack::socket_recv(void *handle, void *data, unsigned size) +{ + struct esp32_socket *socket = (struct esp32_socket *)handle; + + if (!socket) { + return NSAPI_ERROR_NO_SOCKET; + } + + int32_t recv = _esp->recv(socket->id, data, size); + if (recv == -1) { + return NSAPI_ERROR_WOULD_BLOCK; + } else if (recv < 0) { + return NSAPI_ERROR_NO_SOCKET; + } else { + // do nothing + } + + return recv; +} + +int ESP32Stack::socket_sendto(void *handle, const SocketAddress &addr, const void *data, unsigned size) +{ + struct esp32_socket *socket = (struct esp32_socket *)handle; + + if (!socket) { + return NSAPI_ERROR_NO_SOCKET; + } + + if (socket->connected && socket->addr != addr) { + if (!_esp->close(socket->id, socket->accept_id)) { + return NSAPI_ERROR_DEVICE_ERROR; + } + socket->connected = false; + } + + if (!socket->connected) { + int err = socket_connect(socket, addr); + if (err < 0) { + return err; + } + socket->addr = addr; + } + + return socket_send(socket, data, size); +} + +int ESP32Stack::socket_recvfrom(void *handle, SocketAddress *addr, void *data, unsigned size) +{ + struct esp32_socket *socket = (struct esp32_socket *)handle; + + if (!socket) { + return NSAPI_ERROR_NO_SOCKET; + } + + int ret = socket_recv(socket, data, size); + if (ret >= 0 && addr) { + *addr = socket->addr; + } + + return ret; +} + +void ESP32Stack::socket_attach(void *handle, void (*callback)(void *), void *data) +{ + struct esp32_socket *socket = (struct esp32_socket *)handle; + + if (!socket) { + return; + } + + _esp->socket_attach(socket->id, callback, data); +} + +nsapi_error_t ESP32Stack::setsockopt(nsapi_socket_t handle, int level, + int optname, const void *optval, unsigned optlen) +{ + struct esp32_socket *socket = (struct esp32_socket *)handle; + + if (!optlen) { + return NSAPI_ERROR_PARAMETER; + } else if (!socket) { + return NSAPI_ERROR_NO_SOCKET; + } + + if (level == NSAPI_SOCKET && socket->proto == NSAPI_TCP) { + switch (optname) { + case NSAPI_KEEPALIVE: { + if(socket->connected) {// ESP32 limitation, keepalive needs to be given before connecting + return NSAPI_ERROR_UNSUPPORTED; + } + + if (optlen == sizeof(int)) { + int secs = *(int *)optval; + if (secs >= 0 && secs <= 7200) { + socket->keepalive = secs; + return NSAPI_ERROR_OK; + } + } + return NSAPI_ERROR_PARAMETER; + } + } + } + + return NSAPI_ERROR_UNSUPPORTED; +} + +nsapi_error_t ESP32Stack::getsockopt(nsapi_socket_t handle, int level, + int optname, void *optval, unsigned *optlen) +{ + struct esp32_socket *socket = (struct esp32_socket *)handle; + + if (!optval || !optlen) { + return NSAPI_ERROR_PARAMETER; + } else if (!socket) { + return NSAPI_ERROR_NO_SOCKET; + } + + if (level == NSAPI_SOCKET && socket->proto == NSAPI_TCP) { + switch (optname) { + case NSAPI_KEEPALIVE: { + if(*optlen > sizeof(int)) { + *optlen = sizeof(int); + } + memcpy(optval, &(socket->keepalive), *optlen); + return NSAPI_ERROR_OK; + } + } + } + + return NSAPI_ERROR_UNSUPPORTED; +} +