LoRa modules

Table of Contents

LoRa modules (ebyte)
E220 LLCC68 Module
- Features
- Comparison
Pinout
Manual
Fritzing model
3D model
Products

LoRa modules (ebyte) #

Module specs and identification on model number

Chip used:

E22 = SX126x
E28 = SX1281
E32 = SX127x
E80 = LR1121
E106 = SX1302
E220 = LLCC68

The SX1276 and SX1278 from Semtech are commonly used LoRa radio chips for development boards. The SX1276 operates on 868 MHz and 915 MHz bands, typical for Europe and North America, while the SX1278 operates on 433 MHz and 470 MHz bands in other regions.

Possible frequencies:

170 MHz
230 MHz
400 MHz
868 MHz
900 MHz

Interface:

T = UART
M = SPI
G = PCI-e

Signal strength (dbm):

20 (up to 3-5km)
22 (up to 5-6km)
30 (up to 8-10km)
33 (up to 16km)
37 (up to 25km)

Model:

D = DIP
S = SMD

More info: https://www.cdebyte.com/catalog-Module/1/17/0/0/71/0/0/0/

E220 LLCC68 Module #

LoRa Smart Home (LLCC68) is a sub-GHz LoRa® RF Transceiver for medium-range indoor and indoor to outdoor wireless applications. SPI interface. Pin-to-pin is compatible with SX1262. SX1261, SX1262, SX1268, and LLCC68 are designed for long battery life with just 4.2 mA of active receive current consumption. The SX1261 can transmit up to +15 dBm, and the SX1262, SX1268, and LLCC68 can transmit up to +22 dBm with highly efficient integrated power amplifiers.

These devices support LoRa modulation for LPWAN use cases and (G)FSK modulation for legacy use cases. The devices are highly configurable to meet different application requirements for consumer use. The device provides LoRa modulation compatible with Semtech transceivers used by the LoRaWAN® specification released by the LoRa Alliance®. The radio is suitable for systems targeting compliance with radio regulations, including but not limited to ETSI EN 300 220, FCC CFR 47 Part 15, China regulatory requirements, and the Japanese ARIB T-108. Continuous frequency coverage from 150MHz to 960MHz allows the support of all major sub-GHz ISM bands around the world.

Features #

The new LoRa spread spectrum modulation technology developed based on LLCC68, it brings a more extended communication distance and stronger anti-interference ability;
Support users to set the communication key by themselves, and it cannot be read, which significantly improves the confidentiality of user data;
Support LBT function, monitor the channel environment noise before sending, which significantly improves the communication success rate of the module in harsh environments;
Support RSSI signal strength indicator function for evaluating signal quality, improving communication network, and ranging;
Support air wakeup, that is ultra-low power consumption, suitable for battery-powered applications;
Support point to point transmission, broadcast transmission, channel sense;
Support deep sleep, the power consumption of the whole machine is about 5uA in this mode;
The module has built-in PA+LNA, and the communication distance can reach 5km under ideal conditions;
The parameters are saved after power-off, and the module will work according to the set parameters after power-on;
Efficient watchdog design, once an exception occurs, the module will automatically restart and continue to work according to the previous parameter settings;
Support the bit rate of2.4k～62.5kbps;
Support 3.0～5.5V power supply, power supply greater than 5V can guarantee the best performance;
Industrial standard design, supporting long-term use at -40～+85℃;

Comparison #

	LLCC68	SX1278-SX1276
Distance	> 11Km	8Km
Rate (LoRa)	1.76Kbps – 62.5Kbps	0.3Kbps – 19.2Kbps
Sleep power consumption	2µA	5µA

Pinout #

Pin No.	Pin item	Pin direction	Pin application
1	M0	Input（weak pull-up）	Work with M1 & decide the four operating modes. Floating is not allowed; it can be ground.
2	M1	Input（weak pull-up）	Work with M0 & decide the four operating modes. Floating is not allowed; it can be ground.
3	RXD	Input	TTL UART inputs connect to external (MCU, PC) TXD output pin. It can be configured as open-drain or pull-up input.
4	TXD	Output	TTL UART outputs connect to external RXD (MCU, PC) input pin. Can be configured as open-drain or push-pull output
5	AUX	Output	To indicate the module’s working status & wake up the external MCU. During the procedure of self-check initialization, the pin outputs a low level. It can be configured as open-drain or push-pull output (floating is allowed).
6	VCC		Power supply 3V~5.5V DC
7	GND		Ground

As you can see, you can set various modes via M0 and M1 pins.

Mode	M1	M0	Explanation
Normal	0	0	UART and wireless channels are open, and transparent transmission is on
WOR Transmitter	0	1	WOR Transmitter
WOR Receiver	1	0	WOR Receiver (Supports wake up over air)
Deep sleep mode	1	1	The module goes to sleep (automatically wake up when configuring parameters)

Some pins can be used statically, but If you connect them to the microcontroller and configure them in the library, you gain in performance and can control all modes via software.