PHPoC IoT Gateway
-  P5H-151    -  P5H-154
-  P5H-152    -  P5H-155
-  P5H-153    -  P5H-156
PHPoC IoT Board
-  PHPoC Black
-  PHPoC Blue
-  Expansion Board
-  Smart Expansion Board
PHPoC IoT Module
-  P4M-400
PHPoC Shield for Arduino
-  PHPoC WiFi Shield 2
-  Smart Expansion Board for PHPoC Shield 2
Retired Products
-  PBH-101
-  PBH-104
-  PBH-204
-  PHPoC Shield
-  PHPoC WiFi Shield
-  PHPoC Shield 2



PBH-204 is a programmable IoT device, which connects to the Internet via wired or wireless LAN. It supports various networking and security protocols, and encryption algorithm.
PBH-204 is equipped with four high-voltage digital input ports and four relay output ports. This allows you to monitor and control the high-voltage equipment through the Internet according to your own way.
It is equipped with one serial interface to connect and communicate with sensors or equipment which supports RS232, RS422, or RS485. This allows you to collect data from serial equipment/sensors and send it to various systems through the Internet, and vice versa.
PBH-204 is embedded with a PHPoC interpreter, letting you pre-process data as you want before exchanging by writing a the simple PHPoC script. It is very flexible to create customized devices to meet the diverse needs.
Moreover, PBH-204 comes along with an embedded web server, letting you do system setting, control and monitor your equiptment via web browser from a remote site. PBH-204 is a great choice to build customized IoT gateway solutions to interact with your existing systems.

  • PHPoC Interpreter
  • Embedded Web server and WebSocket server
  • Real-time debugging source code via IDE
  • Ethernet 10Base-T or 100Base-TX (Auto-Sensing)
  • IEEE 802.11b/g Wireless LAN
  • Full TCP/IP stack
  • Various networking protocols
  • 4 x high-voltage digital input port
  • 4 x high-voltage digital output port
  • 1 x RS232/RS422/RS485
  • Industrial temperature range (-40℃~+85℃)
  • RoHS Compliant

Hardware PBH-204

Power Input
PWR1 DC8.5V~DC38V with Polarity Auto Recovery Function
PWR2 DC5V ±5% with Reverse Voltage Protection and Surge Protection
Setup DC5V ±5% with Reverse Voltage Protection
Power Consumption Typically 4.2W(Without USB Wireless LAN adapter)

Wireless LAN
Interface IEEE802.11b/g Wireless LAN with a USB dongle
Mode Ad-hoc, Infrastructure, Soft-AP
Wi-Fi Security WPA-PSK / WPA2-PSK, WPA-Enterprise (TTLS/PEAP)

Wired LAN
Ethernet 10Base-T or 100Base-TX(RJ45) Ethernet

Network Protocols
Networking protocols IPv4/IPv6 Dual Stack
Security SSL/TLS

USB Interface
USB A Connector Ralink RT3070/5370 USB Wireless LAN dongle for Wireless LAN
USB B Connector For PC connection to upload/download user PHPoC script

Digital Input 4 Input Ports with Photo-coupler Isolation
Digital Output 4 Output Ports with Relay Out Interface

Serial Interface
RS422 TX+, TX-, RX+, RX-, GND with embedded 100K biasing resistors and TVS
RS485 TRX+, TRX-, GND with embedded 100K biasing resistors and TVS

Power Red
Status Yellow
DI/DO Green
User Programmable LED LED A~H(Yellow)

Dimension 180mm X 110mm X 26mm

Solution Tutorial Tutorial
Part Number Description Note
PBH-204-BO PBH-204 Body
PBH-204 Body
Optional Accessories Description Note
SC Serial Cable
Serial cable Datasheet
UC USB cable
USB cable Datasheet
GWF-3S03 USB wireless LAN adapter
USB Wireless LAN adapter Datasheet
GWF-3S5T antenna USB wireless LAN adapter
USB Wireless LAN adapter (4dBi) Datasheet