First Steps with ESP-01S and HW-305

Hi there,
I have ordered some esp chipsets and got it last week.
Today I found Espruino and was totally flashed, that I can code with JS on the chipset.

I have the Mini-Breadboard HW-305 and ESP-01S plugged on it. (It's the same hardware like in this Video (from 0:00 till 0:30) : https://www.youtube.com/watch?v=6uaIWZCR­Sz8

).

Now I try to connect it to the Espruino-Web-IDE, but without success. Because I use Linux, I've followed the instructions to add my user to plugdev group and re-login to get this new permissions active.

Then I've opened the Espruino-Web-IDE in Chrome and click the yellow Button above.
I see an Popup with the USB-Port, but if I choose this, I got an error:"Connection failed".

In the Settings ⇒ Console, I see this:

We have chrome.serial - not using 'serialport' module
serial_audio: Audio Sample rate : 44100
serial_audio: Audio Serial Baud 9600 Bit time 4.59375
UTF8 Library loaded successfully
GET chrome.storage.sync = {"AUTO_SAVE_CODE":true,"BAUD_RATE":9600,­"BLOCKLY_EXTENSIONS":"|bluetooth|robot|"­,"BLOCKLY_LANGUAGE":"en","BLOCKLY_TO_JS"­:false,"BOARD_JSON_URL":"http://www.espr­uino.com/json","CODE":"var  on = false;\nsetInterval(function() {\n  on = !on;\n  LED1.write(on);\n}, 500);","COMPILATION":true,"COMPILATION_U­RL":"https://www.espruino.com/service/co­mpiler","DISABLE_CODE_HINTS":false,"ENAB­LE_Testing":false,"ENV_ON_CONNECT":true,­"FONT_SIZE":12,"KEYMAP":"sublime","MINIF­ICATION_DeadCode":true,"MINIFICATION_LEV­EL":"","MINIFICATION_Literal":true,"MINI­FICATION_Mangle":true,"MINIFICATION_Unre­achable":true,"MINIFICATION_Unused":true­,"MODULE_AS_FUNCTION":false,"MODULE_EXTE­NSIONS":".min.js|.js","MODULE_MINIFICATI­ON_LEVEL":"ESPRIMA","MODULE_PROXY_ENABLE­D":false,"MODULE_PROXY_PORT":"","MODULE_­PROXY_URL":"","MODULE_URL":"https://www.­espruino.com/modules","OFFLINE_DATA":"",­"OFFLINE_DATA_DOWNLOAD":"","OFFLINE_DATA­_UPLOAD":"","OFFLINE_ENABLED":false,"PRE­TOKENISE":false,"RESET_BEFORE_SEND":true­,"SAVE_ON_SEND":0,"SERIAL_AUDIO":"0","SE­RIAL_FLOW_CONTROL":true,"SERIAL_IGNORE":­"/dev/ttyS*|/dev/*.SOC|/dev/*.MALS","SER­IAL_TCPIP":"","SERIAL_THROTTLE_SEND":fal­se,"SET_TIME_ON_WRITE":false,"SHOW_CODE_­LINK_ICON":false,"SHOW_WEBCAM_ICON":0,"S­TORE_LINE_NUMBERS":true,"Sound_Error":""­,"Sound_Info":"","Sound_Success":"","Sou­nd_Warning":"","Speak_Error":false,"Spea­k_Info":false,"Speak_Success":false,"Spe­ak_Warning":false,"UI_MODE":"Normal","WE­BCAM_CONSTRAINTS":0,"WEB_BLUETOOTH":true­,"WEB_SERIAL":true}
Initialising SettingsConsole
Initialising Utils
Initialising Config
Initialising Notifications
Initialising Status
Initialising App
Initialising File
Initialising Code
Initialising Serial
  - Initialising Serial Chrome Serial
  - Initialising Serial Chrome Socket
  - Initialising Serial Web Audio
  - Initialising Serial Web Bluetooth
  - Initialising Serial Web Serial
Initialising Terminal
Initialising CodeWriter
Initialising Modules
Initialising Env
Initialising Flasher
Initialising EditorBlockly
Initialising EditorJavaScript
Initialising Send
Initialising MenuPortSelector
Initialising MenuSettings
Initialising MenuFlasher
Initialising SettingsAbout
Initialising SettingsFlasher
Initialising BoardJSON
Initialising VersionChecker
Initialising Compiler
Initialising Assembler
Initialising GetGitHub
Initialising Unicode
Initialising Minify
Initialising Pretokenise
Initialising SaveOnSend
Initialising SetTime
Initialising Tutorial
Initialising Webcam
Initialising FontSize
Initialising UiMode
Initialising URLHandler
Initialising CodeLink
Initialising Project
Initialising Testing
Initialising Notification_Sound
Initialising Tern
Initialising Debugger
Initialising Tour
Initialising SettingsProfile
Initialising HelpLinks
Initialising Offline
Initialising CoreModules
Loaded code from storage.
GET chrome.storage.local.OFFLINE_DATA = 0 bytes
No navigator.bluetooth - Web Bluetooth not enabled
No navigator.serial - Web Serial not enabled
>>> Connecting...
Set Slow Write = true
Unable to open device (connectionInfo=undefined)
ERROR: Unable to open device (connectionInfo=undefined)
ERROR: [notify_error] Connection Failed.
>>> Connection Failed.
>>> Connecting...
Set Slow Write = true
Unable to open device (connectionInfo=undefined)
ERROR: Unable to open device (connectionInfo=undefined)
ERROR: [notify_error] Connection Failed.
>>> Connection Failed.

Can anybody give me a helping hand to start with my first IoT and Espruino? I would love to do it with Espruino and not with Arduino, becauese I'm still familiar with JS-Coding.

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