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Rene K. Mueller edited this page Mar 6, 2018 · 68 revisions

Introduction

NodeMCU/Linux aims to target following hardware running a Debian-based Linux:

  • Raspberry Pi series (like Raspberry Pi 3, Raspberry Pi Zero) running Raspbian
  • Orange Pi series (like Orange Pi Zero, Orange Pi Lite, etc) running Armbian
  • NanoPi series (like NanoPi Neo, etc) running Armbian

detailed list of supported devices will be published as soon gpio and i2c modules are more complete and tested.

How To Implement

  • majority of the modules are meant to be implemented with Lua itself and external modules via luarocks
  • if hardware-near implementation is needed:
  • ...

Modules

Following modules are aimed to implement NodeMCU/Linux mainly based on the NodeMCU/ESP8266 API and partially on NodeMCU/ESP32 API:

adc

Functions (bold=implemented):

  • adc.force_init_mode() Checks and if necessary reconfigures the ADC mode setting in the ESP init data block.
  • adc.read() Samples the ADC.
  • adc.readvdd33() Reads the system voltage.

ads1115

adxl345

am2320

apa102

bit

State: built-in

Notes:

bme280

bmp085

coap

cron

Functions (bold=implemented):

  • cron.schedule() Creates a new schedule entry.
  • cron.reset() Removes all scheduled entries.
  • cron.entry:handler() Sets a new handler for entry.
  • cron.entry:schedule() Sets a new schedule mask.
  • cron.entry:unschedule() Disables schedule.

crypto

dht

ds18b20

encoder

enduser setup

file

State: most functionality implemented with io module, vastly untested

Functions (bold=implemented):

  • file.chdir() Change current directory (and drive).
  • file.exists() Determines whether the specified file exists.
  • file.format() Format the file system.
  • file.fscfg() Returns the flash address and physical size of the file system area, in bytes.
  • file.fsinfo() Return size information for the file system.
  • file.list() Lists all files in the file system.
  • file.mount() Mounts a FatFs volume on SD card.
  • file.on() Registers callback functions.
  • file.open() Opens a file for access, potentially creating it (for write modes).
  • file.remove() Remove a file from the file system.
  • file.rename() Renames a file.
  • file.stat() Get attribtues of a file or directory in a table.
  • file.close(), file.obj:close() Closes the open file, if any.
  • file.flush(), file.obj:flush() Flushes any pending writes to the file system, ensuring no data is lost on a restart.
  • file.read(), file.obj:read() Read content from the open file.
  • file.readline(), file.obj:readline() Read the next line from the open file.
  • file.seek(), file.obj:seek() Sets and gets the file position, measured from the beginning of the file, to the position given by offset plus a base specified by the string whence.
  • file.write(), file.obj:write() Write a string to the open file.
  • file.writeline(), file.obj:writeline() Write a string to the open file and append '\n' at the end.

gdbstub

gpio

State: partially implemented but entirely untested

Functions (bold=implemented):

  • gpio.mode() Initialize pin to GPIO mode, set the pin in/out direction, and optional internal weak pull-up.
  • gpio.read() Read digital GPIO pin value.
  • gpio.serout() Serialize output based on a sequence of delay-times in µs.
  • gpio.trig() Establish or clear a callback function to run on interrupt for a pin.
  • gpio.write() Set digital GPIO pin value.

Notes:

hdc1080

hmc5883l

http

State: partial implemented but not functional (requires net module to work)

Functions (bold=implemented):

  • http.delete() Executes a HTTP DELETE request.
  • http.get() Executes a HTTP GET request.
  • http.post() Executes a HTTP POST request.
  • http.put() Executes a HTTP PUT request.
  • http.request() Execute a custom HTTP request for any HTTP method.

Notes:

hx711

i2c

State: basic incomplete and untested skeleton

Notes:

l3g4200d

math

Status: built-in

Notes:

  • ESP8266: not available
  • ESP32: experimentally available
  • Linux: built-in

mcp4725

mdns

mqtt

net

Notes:

Functions (bold=implemented):

  • net.createConnection() Creates a client.
    • net.socket:close() Closes socket.
    • net.socket:getpeer() Retrieve port and ip of remote peer.
    • net.socket:getaddr() Retrieve local port and ip of socket.
    • net.socket:hold() Throttle data reception by placing a request to block the TCP receive function.
    • net.socket:on() Register callback functions for specific events.
      • connection
      • receive
      • close
      • sent
    • net.socket:send() Sends data to remote peer.
    • net.socket:connect() Connect to a remote server.
    • net.socket:ttl() Changes or retrieves Time-To-Live value on socket.
    • net.socket:unhold() Unblock TCP receiving data by revocation of a preceding hold().
  • net.createServer() Creates a server.
    • net.server:close() Closes the server.
    • net.server:getaddr() Returns server local address/port.
    • net.server:listen() Listen on port from IP address.
      • net.socket:dns() Provides DNS resolution for a hostname.
      • net.socket:getpeer() Retrieve port and ip of remote peer.
      • net.socket:getaddr() Retrieve local port and ip of socket.
      • net.socket:hold() Throttle data reception by placing a request to block the TCP receive function.
      • net.socket:on() Register callback functions for specific events.
        • connection
        • receive
        • sent
      • net.socket:send() Sends data to remote peer.
      • net.socket:ttl() Changes or retrieves Time-To-Live value on socket.
      • net.socket:unhold() Unblock TCP receiving data by revocation of a preceding hold().
  • net.createUDPSocket() Creates an UDP socket.
  • net.multicastJoin() Join multicast group.
  • net.multicastLeave() Leave multicast group.
    • net.udpsocket:close() Closes UDP socket.
    • net.udpsocket:listen() Listen on port from IP address.
    • net.udpsocket:on() Register callback functions for specific events.
    • net.udpsocket:send() Sends data to specific remote peer.
    • net.udpsocket:dns() Provides DNS resolution for a hostname.
    • net.udpsocket:getaddr() Retrieve local port and ip of socket.
    • net.udpsocket:ttl() Changes or retrieves Time-To-Live value on socket.
  • net.dns.getdnsserver() Gets the IP address of the DNS server used to resolve hostnames.
  • net.dns.resolve() Resolve a hostname to an IP address.
  • net.dns.setdnsserver() Sets the IP of the DNS server used to resolve hostnames.

node

State: partially implemented, but untested

Functions (bold=implemented):

  • node.bootreason() Returns the boot reason and extended reset info.
  • node.chipid() Returns the ESP chip ID.
  • node.compile() Compiles a Lua text file into Lua bytecode, and saves it as .
  • node.dsleep() Enters deep sleep mode, wakes up when timed out.
  • node.flashid() Returns the flash chip ID.
  • node.flashsize() Returns the flash chip size in bytes.
  • node.heap() Returns the current available heap size in bytes.
  • node.info() Returns NodeMCU version (major,minor,dev), chipid, flashid, flash size, flash mode, flash speed, architecture (new: 'esp8266', 'esp32', or 'linux')
  • node.input() Submits a string to the Lua interpreter.
  • node.output() Redirects the Lua interpreter output to a callback function.
  • node.restart() Restarts the chip/device, Hint: nodemcu must be run as root (e.g. via sudo nodemcu)
  • node.restore()
  • node.setcpufreq() Change the working CPU Frequency [MHz], loose setting (e.g. choosing next possible valid frequency out of a table)
  • node.sleep() Put NodeMCU in light sleep mode to reduce current consumption.
  • node.stripdebug() Controls the amount of debug information kept during node.
  • node.osprint() Controls whether the debugging output from the SDK is printed.
  • node.random() This behaves like math.
  • node.egc.setmode() Sets the Emergency Garbage Collector mode.
  • node.task.post() Enable a Lua callback or task to post another task request.

ow (1-Wire)

pcm

perf

pwm

rc

rfswitch

rotary

rtcfifo

rtcmem

rtctime

State: partially implemented, but untested

Functions (bold=implemented):

  • rtctime.dsleep() Puts the device into deep sleep mode, like node.
  • rtctime.dsleep_aligned() For applications where it is necessary to take samples with high regularity, this function is useful.
  • rtctime.epoch2cal() Converts a Unix timestamp to calendar format.
  • rtctime.get() Returns the current time.
  • rtctime.set() Sets the rtctime to a given timestamp in the Unix epoch (i.

Notes:

si7021

sigma delta

sjson

Status: partially implemented

Functions (bold=implemented):

  • sjson.encoder() This creates an encoder object that can convert a LUA object into a JSON encoded string.
  • sjson.encoder:read() This gets a chunk of JSON encoded data.
  • sjson.encode() Encode a Lua table to a JSON string.
  • sjson.decoder() This makes a decoder object that can parse a JSON encoded string into a lua object.
  • sjson.decoder:write() This provides more data to be parsed into the lua object.
  • sjson.decoder:result() This gets the decoded lua object, or raises an error if the decode is not yet complete.
  • sjson.decode() Decode a JSON string to a Lua table.

Notes:

sntp

  • sntp.sync() Attempts to obtain time synchronization.
  • sntp.setoffset() Sets the offset between the rtc clock and the NTP time.
  • sntp.getoffset() Gets the offset between the rtc clock and the NTP time.

somfy

spi

Notes:

struct

State: built-in

Functions (bold=implemented):

  • struct.pack()
  • struct.unpack()

Notes:

switec

tcs34725

tls

tm1829

tmr

State: most functionality implement, functional since luanode is used as Lua framework:

Functions (bold=implemented):

  • tmr.now() Returns the system counter, which counts in microseconds.
  • tmr.time() Returns the system uptime, in seconds (integer)
  • tmr.uptime() (new) Returns the system uptime in seconds with microsecond precision (float)
  • tmr.create() Creates a dynamic timer object.
    • tmr:alarm() This is a convenience function combining tmr.
    • tmr:interval() Changes a registered timer's expiry interval.
    • tmr:register() Configures a timer and registers the callback function to call on expiry.
    • tmr:resume() Resume an individual timer.
    • tmr:start() Starts or restarts a previously configured timer.
    • tmr:state() Checks the state of a timer.
    • tmr:stop() Stops a running timer, but does not unregister it.
    • tmr:suspend() Suspend an armed timer.
    • tmr:unregister() Stops the timer (if running) and unregisters the associated callback.
  • tmr.resume_all() Resume all timers.
  • tmr.suspend_all() Suspend all currently armed timers.
  • tmr.softwd() Provides a simple software watchdog, which needs to be re-armed or disabled before it expires, or the system will be restarted.
  • tmr.wdclr() Feed the system watchdog.

tsl2561

u8g / u8g2

u8g(2) is a pretty self-contained library except it asks for a I2C communication interface:

  • either implement it per board/chipset (cumbersome) or
  • call Lua layer i2c abstraction and be hardware independent

uart

Notes:

ucg

websocket

Notes:

wifi

Functions (bold=implemented):

based on NodeMCU/ESP32 wifi API:

  • wifi.getchannel() Gets the current WiFi channel.
  • wifi.getmode() Gets WiFi operation mode.
  • wifi.mode() Configures the WiFi mode to use.
  • wifi.start() Starts the WiFi interface(s).
  • wifi.stop() Shuts down the WiFi interface(s).
  • wifi.sta.config() Sets the WiFi station configuration.
  • wifi.sta.connect() Connects to the configured AP in station mode.
  • wifi.sta.disconnect() Disconnects from AP in station mode.
  • wifi.sta.on() Registers callbacks for WiFi station status events.
  • wifi.sta.getmac() Gets MAC address in station mode.
  • wifi.sta.scan() Scan for available networks.
  • wifi.ap.config() Configures the AP.
  • wifi.ap.on() Registers callbacks for WiFi AP events.
  • wifi.ap.getmac() Gets MAC address in access point mode.

and a few from ESP8266 wifi API:

  • wifi.sta.gethostname()
  • wifi.sta.sethostname()
  • wifi.sta.status()
  • wifi.sta.getmac()

wps

ws2801

ws2812

xpt2046

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