USR IOT USR-C215 User manual

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USR-C215 Hardware Manual
File version: 1.1.01

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Content
USR-C215 Hardware Manual ...................................................................................................... 1
1. Product Overview ................................................................................................................... 3
1.1. Dimension ..................................................................................................................... 3
1.2. Pin Defination................................................................................................................ 3
2. Hardware Design .................................................................................................................... 5
2.1. Typical Connection ........................................................................................................ 5
2.2. Power Interface............................................................................................................. 5
2.3. UART Interface.............................................................................................................. 6
2.4. Reset and Reload........................................................................................................... 6
2.5. Antenna......................................................................................................................... 7
3. Contact ................................................................................................................................... 8
4. Disclaimer............................................................................................................................... 8
5. Update History........................................................................................................................ 8

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1.Product Overview
1.1. Dimension
Module size: 22.0*13.5mmmm, error ±0.2mm, pin size as follows:
Figure 1 Dimension
1.2. Pin Definition

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PIN
Name
Signal Type
Definition
1
GND
P
Power Ground
2
VDD
P
3.3V
3
RELOAD
I
Press 1-3 seconds to start simplelink, over 3 seconds to
restore default settings
4
RESET
I
Reset the module, take effect in low level
5
UART_RX
I
Serial port receiving pin
6
UART_TX
O
Serial port sending pin
7
PWR_SW
N
Not available
8
WPS
N
Not available
9
READY
O
Indication pin for module working normally, take effect in
low level and can connect to external LED
10
nLINK
O
Indication pin for module WIFI linking successfully, take
effect in low level and can connect to external LED
Figure 2 Pin definition

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2.Hardware Design
2.1. Typical Connection
Figure 3 Typical connection
2.2. Power Interface
Switching power supply is recommended. Working voltage VCC range from 3.0V~3.6V, 3.3V is
recommended. Power the module by main power pin, pin interface is in parallel with appropriate
energy-storage capacitance and high frequency capacitance. Circuit diagram as follows:
Figure 4 Power interface

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2.3. UART Interface
When communicate to MCU with 3.3V, just connecting TXD of module to RXD of MCU and RXD of module to
TXD of MCU.
When communicate to MCU with 5V, switching circuit is necessary. Switching circuit diagram as follows:
Figure 5 UART interface
2.4. Reset and Reload
nReload: nReload pin can connect to external button or configuration pin. Press button 1s to 3s to enter
simplelink mode, press over 3s to restore default settings. nReload pin should connect to external 4.7k-10k
Ohm pull-up resistor.
nReset: Resetting the module and taking effect in low level. nReset pin connect to internal 100K Ohm pull-up
resistor to 3.3V. Press over 0.5s and release to reset the device.
Circuit diagram as follows:
Figure 6 Reset and Reload

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2.5. Antenna
USR-C215 have external I-PEX antenna.
Note:
1. On PCB board, user can’t place component on antenna part.
2. Keep antenna away from metal, inductance or some other interference source.
3. Ensure antenna locate on margin of PCB board.

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3.Contact
Company: Jinan USR IOT Technology Limited
Address: Floor 11, Building No.1, No.1166, Xinluo Street, Gaoxin District, Jinan city, Shandong province,
250101 China
Tel: [phone]
Web: www.usriot.com
Support: h.usriot.com
Email: [e-mail]
4.Disclaimer
This document provide the information of USR-C215 products, it hasn’t been granted any intellectual property
license by forbidding speak or other ways either explicitly or implicitly. Except the duty declared in sales terms
and conditions, we don’t take any other responsibilities. We don’t warrant the products sales and use
explicitly or implicitly, including particular purpose merchantability and marketability, the tort liability of any
other patent right, copyright, intellectual property right. We may modify specification and description at any
time without prior notice.
5.Update History
2017-09-20 V1.1.01 created.