Site update: Let’s encrypt!

Let’s Encrypt for Windows 10

Step by step:
1. VirtualBox install ubuntu linux
2. Install certbot
3. 利用 certbot 產生 cert
我是用 “http 驗證” , 要上傳驗證檔案到 web site 到指定目錄並修改 web.config.
certbot -d "" --manual --preferred-challenges http certonly
4. cert pem 轉為 pfx (要輸入 password)
openssl pkcs12 -export -out /tmp/certificate.pfx -inkey privkey.pem -in cert.pem -certfile chain.pem
5. 在 IIS 設定 pfx
6. Done!

SDR (Software Defined Radio) with TX

In Stock:
BladeRF USD $420 – $650
USRP B200 USD $700?
LimeSDR USD $299

ADALM-PLUTO: A New $149 TX Capable SDR with 325 – 3800 MHz Range, 12-Bit ADC and 20 MHz Bandwidth
LimeSDR Mini
up/down-convert 10 GHz
LMS8001 Companion
Raspberry Pi + Rpitx + low pass filter as TX, RTL-SDR Dongle as RX
Transmitting FM, AM, SSB, SSTV and FSQ with just a Raspberry Pi

Digital Television Transmitter on Raspberry Pi:
GPIO -> QPSK (!)
Digital Television Transmitter on Raspberry Pi (GitHub)

ideal power diode

Uses two more p-channel MOSFETs to eliminate cross conduction by forming back-to-back diodes with the body diodes of the MOSFETs.
The comparator (LM293) compares the battery voltage with the main power voltage. When the main voltage drops below the battery voltage, the MOSFET is turned on and the LED is lit.

answered Sep 27 ’14 at 8:28 CarpetPython

CarpetPython: Thank you!
“Ideal” Power Diode
The protection circuit in the RPI model B+ functions as an ideal power diode.
Primer on PowerPath Controllers, Ideal Diodes & Prioritizers

High Side OR-ing FET Controller

smart bypass diode used in photovoltaic applications

LSI SAS 9207-8i install (ESXI 6 , Ubuntu 16.04)

Use case:
ESXI 6.0 , guest OS :Ubuntu 16.04
LSI SAS 9207-8i passthrough guest OS.

List all disk command:

8i attached disk not find (T_T)

workaround method:

change grub:
# sudo nano /etc/default/grub


Save and exit.

Then update grub:
# sudo update-grub

# sudo shutdown -r now

disk find, success!


Commandd list PCI device:
# lspci -v

LSI card driver state :
# modinfo mpt2sas

VMWARE ESXi-Customizer-PS Troubleshoot

ESXi-Customizer-PS official site


1. PowerShell :Set ExecutionPolicy to RemoteSigned
Lunch PowerShell as administrator

Set-ExecutionPolicy RemoteSigned

2. Use test first

.\ESXi-Customizer-PS-v2.4.ps1 -test

3.Network Exception:

Connecting the VMware ESXi Online depot ...Add-EsxSoftwaredepot : Could not download from depot at, skipping
(('', '', '[Errno 4] IOError: <urlopen
error &#91;Errno 10013&#93; An attempt was made to access a socket in a way forbidden by its access permissions>'))
At C:\script\ESXi-Customizer-PS-v2.4.ps1:231 char:22
+     if ($basedepot = Add-EsxSoftwaredepot $vmwdepotURL) {
+                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ReadError: (System.String[]:String[]) [Add-EsxSoftwareDepot], Exception
    + FullyQualifiedErrorId : ConnectDepotError,VMware.ImageBuilder.Commands.AddDepot

FATAL ERROR: Cannot add VMware ESXi Online depot. Please check your Internet connectivity and/or proxy settings!

Try change Endpoint security / Anti-Virus Software setting, Your PowerShell can’t access network.

4. Rufus update menu.c32 fail:
Download menu.c32 in
After Rufus write to USB drive, copy menu.c32 to USB drive root directory.

ESXI install hang on “initializing IOV”.
Disable Intel VT-d in BIOS when your CPU does not support VT-d.