E32-400M33S SX1278 chip Lora module 433/470MHz LoRa spread spectrum technology SPI hardware module

[Chip solution]:SX1278

[Transmitting power]:33dBm

[Communication distance]:16km

[Product size]:24*38.5m

[Introduction]:E32-400M33S is a 410~493MHz SMD LoRaTM wireless module with a maximum transmitting power of 2W, which is independently developed based on the SX1278 produced by Semtech in the United States. As the imported SX1278 is used as the core of the module, a power amplifier (PA) and a low noise amplifier (LNA) are built in on the original basis, so that the maximum transmitting power reaches 1W while the receiving sensitivity is further improved, and the overall communication stability is greatly improved compared with products without power amplifiers and low noise amplifiers. This module is mainly aimed at smart homes, wireless meter reading, scientific research and medical treatment, as well as medium and long-distance wireless communication equipment.

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Main parametersperformanceRemark
minimum valuemaximum value
Supply voltage (V)05.5Exceeding 5.5V will permanently burn the module
Blocking power (dBm)-10LNA may burn if used at close range
Working temperature (℃)-4085Industrial grade
Main parametersPerformanceRemark
Minimum valueTypical valueMaximum value
Working voltage (V)3.355.5>5.5V can cause permanent damage to the module;
Communication level (V)-3.3--
Working temperature (℃)-40-85Industrial grade design
Working frequency band (MHz)410-493-
Power consumptionEmission current (mA)-1100--
Receive current (mA)-19--
Sleep current (μA)-2--
Maximum transmit power (dBm)-33

Receiving sensitivity (dBm)-123-124-125The air rate is 1.2kbp
Main parametersdescribeRemark
reference distance16KmIn a clear and open environment, the antenna gain is 5dBi, the antenna height is 2 meters, and the air rate is 2.4kbps.
FIFO256ByteMaximum length of a single send
Crystal frequency32MHzPassive crystal oscillator
Modulation methodLoRa TM (recommend)FSK/GFSK/MSK/GMSK/OOK
Packaging methodSMD typeSpacing 2.54mm
Interface mode2.54mmstamp hole
Communication interfaceSPI0~10Mbps
Overall dimensions24*38.5mm-
Antenna interfaceStamp hole/IPEXEquivalent impedance is about 50Ω
weight5.5g-


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serial numberpinPin directionRemark
1GND-Ground wire, connected to the power reference ground
2GND-Ground wire, connected to the power reference ground
3GND-Ground wire, connected to the power reference ground
4GND-Ground wire, connected to the power reference ground
5GND-Ground wire, connected to the power reference ground
6RXENinputThe radio frequency switch receives the control pin, connects to the external microcontroller IO, and is active at high level.
7TXENinputRF switch emission control pin, connected to external microcontroller IO, active at high level
8DIO2input/outputConfigurable general-purpose IO port (see SX1276 manual for details)
9VCC-Power supply, range 3.3~5.5V (it is recommended to add external ceramic filter capacitors)
10VCC-Power supply, range 3.3~5.5V (it is recommended to add external ceramic filter capacitors)
11GND-Ground wire, connected to the power reference ground
12GND-Ground wire, connected to the power reference ground
13NC-hanging in the air
14DIO3input/outputConfigurable general-purpose IO port (see SX1276 manual for details)
15DIO4input/outputConfigurable general-purpose IO port (see SX1276 manual for details)
16GOD5input/outputConfigurable general-purpose IO port (see SX1276 manual for details)
17GND-Ground wire, connected to the power reference ground
18GND-Ground wire, connected to the power reference ground
19DIO1input/outputConfigurable general-purpose IO port (see SX1276 manual for details)
20GOD0input/outputConfigurable general-purpose IO port (see SX1276 manual for details)
21NRSTinputChip reset trigger input pin
22MISOoutputSPI data output pin
23SMOKEinputSPI data input pin
24SCLKinputSPI clock input pin
25NSSinputModule chip select pin, used to start an SPI communication
26GND-Ground wire, connected to the power reference ground
27ON-Antenna interface, stamp hole (50Ω characteristic impedance)
28GND-Ground wire, connected to the power reference ground