Module request
消息交互器，封装Link，阻塞执行，一问一答，方便主从模式编程
Functions
| Request:new (link, timeout) | 创建询问器 abc |
| Request:request (request, want_len) | 询问 |
物联小白
Contents
Modules
- agent
- autoload
- binary
- boot
- device
- configs
- cron
- database
- Debounce
- Event
- kv
- settings
- utils
- Watcher
- yaml
- serial
- tcp_client
- udp_client
- BreathLed
- Button
- Buzzer
- Fan
- GPS
- Led
- Relay
- RTC
- Servo
- Speeder
- Stepper
- Switch
- Voice
- watch_dog
- device
- devices
- link
- links
- model
- points
- protocol
- protocols
- request
- tees
- cloud
- master
- iot
- gpio
- uart
- i2c
- spi
- adc
- pwm
- can
- mqtt_client
- socket
- voice
- cjt188_device
- cjt188_master
- modbus
- ModbusMapper
- modbus_master_device
- modbus_master
- modbus_slave_device
- modbus_slave
- components
- Executor
- FSM
- planners
- robot
- schedule
- vm
- Scene
- scenes
- Map
- program
- tjc
- Complementary
- ekf
- EMA
- filters
- IIR
- Kalman
- MA
- Median
- Particle
- a_star
- d_star
- dijkstra
- IncrementPid
- PositionPid
- rrt
- theta_star