Small Size Wi-Fi Modules for IoT Projects

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Introduction

Nowadays, IoT is a vaster thought. The world is of the internet and computers. Thus, every device needed the internet to connect with the world. So, as it is getting bigger, electronic devices are also getting into it. And, for this, they need wifi modules. A wi-fi module is an electronic component that gives access to the Wi-Fi network in your device or project. There are many wi-fi modules in the market, So, in this tutorial, we are going to discuss “Small Size Wi-Fi modules for IoT Projects”

Small Size Wi-Fi Modules

ISM 43903-R48-L54
WGM110
AIR602
Zentri AMW037

ISM 43903-R48-L54

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This small-size wi-fi module needs no operating system, and it has an integrated TCP/IP Stack. This module has great applications in computing devices, industrial systems, medical equipment, gaming gadgets, etc.

Features

ARM Cortex-R4 clocked at 160 MHz (in 1× mode) or up to 320 MHz (in 2× mode).
1 MB of SRAM and 640 KB ROM are available for the applications processor.
One high-speed 4-wire UART interface with operation up to 4 Mbps.
Two low-speed 2-wire UART interfaces multiplexed on general-purpose I/O (GPIO)
pins.
Two dedicated BSC1 interfaces.
Two SPI master/slave interfaces with operations up to 24 MHz
U.FL Connector for external 2.4 GHz Antenna
Configurable using IWIN AT commands.
Host interface: UART
44-Pin and L44+10 Land Grid Array Footprint
14.5mm x 30mm x 2.5 mm
17 GPIO’s
Input Voltage: 3.3 V
Low-power operation with built-in low-power modes.
Proven Interoperability … Connects with other vendor’s a/b/g/n Access Points in the Wireless LAN.

WGM110

This small-size wi-fi module has all the basic needed elements or components that are required for any IoT application including chip antenna, microcontroller, external antenna, and IP stack. It also supports HTTP servers and protocols like TCP and UDP.

Features

Chip Antenna: WGM110A
External Antenna: WGM110E (u.FL connector)
TX Power: +16 dBm, RX Sensitivity: -98 dBm
Range: up to 450 m
802.11: b/g/n
Bit rate: up to 72.2 Mbps
802.11 Security: WPA2/WPA Personal, WPA2/WPA Enterprise and WEP
STA (Station Mode)
SoftAP (Soft Access Point Mode): up to 5 clients
Wi-Fi Direct
WPS: 1.0 (push-button)
IP version: IPv4 , IP multicast
TCP: client/server, UDP: client/server, TCP sockets: 20+
DHCP: client/server
DNS: client/server
mDNS , DNS-SD
HTTP: server
TLS/SSL: client
Software APIs
BGAPI™ serial protocol API over UART/SPI/USB for modem usage
BGLIB™ host API which implements BGAPI serial protocol
BGScript™ scripting language for standalone usage
Free SDK
MCU Features
- ARM® Cortex-M3
- 48 MHz
- 128 kB RAM
- 1 MB Flash

Specifications

Supply voltage: 2.7 V to 4.8 V for the radio block
Supply voltage: 1.98 V to 3.8 V for the processor block
261 mA TX current at +16 dBm
81 mA RX current
2.5 mA associated idle consumption
23 μA deep sleep current
Temperature range: -40°C to +85°C

AIR602 Wi-fi Development Board

They based this small-size wifi module on one embedded Wi‐Fi SoC chip (W600). The module has many great applications. For example, we can use it in a smart home for intelligent home appliances, medical monitoring equipment, in industrial control systems, and many other IoT applications.

Features

Stamp hole interface, spacing 2mm
2 UART interfaces, support RTS/CTS, baud rate range 1200bps ~ 2Mbps
1 high-speed SPI device controller with an operating clock range of 0 ~ 50MHz
Integrated GPIO controller
Support IEEE802.11 b/g/e/i/d/k/r/s/w/n
Also, the Support frequency range：2.4~2.4835 GHz
Support Wi‐Fi WMM/WMM‐PS/WPA/WPA2/WPS
It also Supports Wi‐Fi Direct
Support EDCA channel access method
Support 20/40M bandwidth working mode
Moreover, supports STBC, GreenField, Short‐GI, support the reverse transmission
Support RIFS frame interval
Air602 Hardware Design Manual
Support AMPDU、AMSDU
Support IEEE802.11n MCS 0~7, MCS32 physical layer transmission rate, transmission rate up to 150Mbps
Short Preamble support at 2/5.5/11 Mbps rate transmission
Support HT‐immediate Compressed Block Ack、Normal Ack、No Ack response method
Also, Support CTS to self
Support STA/AP/AP+STA function
In the BSS network, multiple multicast networks are supported, and each multicast network is supported in different encryption modes. It can support up to 32 multicast networks and incoming STA encryption.
When the BSS network is used as an AP, the total number of supported sites and groups is 32, and 16 sites are
supported in the IBSS network.
Supports AT+ instruction protocol based on ASCII encoding (UART interface)
Support multiple network protocols: TCP/UDP/ICMP/DHCP/DNS/HTTP
Support DHCP Server、DNS Server
Also, Support for scalable WEB servers
Support firmware online upgrade

Specifications

Operating Voltage 3.3V
Operating current 110mA（PS Mode 35mA，DTIM = 1）
Storage temperature ‐40~+125 ℃
Operating humidity 5%~90%（ No condensation ）
Operating temperature ‐40~+85℃
Dimensions 10mm×12mm

Zentri AMW037

This small-size wi-fi module provides advanced network and wifi solutions. It has vast applications in various fields. For example in industries, it can be used in energy monitoring and appliance control, on the consumer side we can use it in toys and audio applications. Moreover, it also has some security and fitness applications.

Features

Self-contained ultra-low power Wi-Fi module with
industry-standard SSL/TLS secure TCP/IP network stack and PCB Trace antenna.
Integrated SPI-serial flash for software upgrades
and user-accessible read/write file system
Single band 2.4GHz IEEE 802.11b/g/n 1×1 Wi-Fi transceiver
Includes support for all Wi-Fi security modes including Open, WEP, WPA, and WPA2-PSK
32-bit application processor
Operates up to 160MHz core frequency
UART: 1 x 4-wire, 1 x TX only up to 4.5Mbit/s
GPIO: Up to 8 GPIOs (overlaid with peripherals)
A/D converter: 1 x 10-bit resolution
PWM: Up to 4 PWM outputs