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Modbus master

magnusbpt·Modbus-wireless·Wireless modbus/Produktion/Modbus_master.kicad_pcb

Modbus master PCB layout, top view — open source AVR/Arduino board by magnusbpt
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About the Modbus master PCB

Modbus master is an open source AVR/Arduino PCB design by magnusbpt, published on GitHub. It is a 2-layer board measuring 104 × 129 mm, with 77 components from 41 distinct parts.

Its main chip is the ATMEGA2560-16AU, from the AVR/Arduino family. Other key parts include the LoRa-E5, SP485EN-L/TR, L7805CV, SIM7080G and LSF0204PW-Q100J. By type, the board carries 30 resistors, 19 capacitors, 10 diodes, 6 ICs, 6 connectors and 2 transistors.

It belongs with the iot & wireless designs in this gallery.

Main components on the Modbus master

LoRa-E5ATMEGA2560-16AUSP485EN-L/TRL7805CVSIM7080GLSF0204PW-Q100J

Modbus master bill of materials (BOM)

77 components, 41 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LoRa-E5
IC1
1
ATMEGA2560-16AU
ATmega2560-16A
U1
1
SP485EN-L/TR
U2
1
L7805CV
L7805
U3
1
SIM7080G
U4
1
LSF0204PW-Q100J
U5
2
BC847CW,115
BC847CW
Q1, Q2
1
ABM3B-8.000MHZ-10-1-U-T
Y1
1
TB002-500-03BE
Screw_Terminal_01x03
J1
1
SIM8066-6-1-14-01-A
XKNANO-113
J2
1
Conn_01x04_Pin
J3
1
U.FL-R-SMT-1(10)
Conn_Coaxial
J4
1
TB002-500-04BE
Screw_Terminal_01x04
J5
1
54102-T06-00
AVR-ISP-6
J6
1
TL3305AF260QG
SW1
1
VAL**
mouse-bite-2mm-slot
1
ESDA6V1-5W6
D1
1
NH-B2020RGBA-HF
D2
1
150060VS75000
GREEN LED
D3
3
SS0540_R1_00001
D4, D5, D8
Show 21 more
QtyPartRefs
2
GS1M-LTP
D6, D10
1
150060YS75000
YELLOW LED
D7
1
DF2S6.8FS,L3M
D9
1
0R
L1
5
C0402C330J5GAC
33pF
C1, C2, C3, C4, C5
7
C1005X7R1C104K050BC
100nF
C6, C7, C8, C9, C11, C12, C14
1
CL21B334KBFNNNG
330nF
C10
1
SCMQ14D474PRBB0
0.47F SC
C13
1
GRM155R70J105KA12D
1uF
C15
1
CL31A107MQHNNWE
100uF
C16
1
GRM155R70J105KA12D
4.7uF
C17
2
GRM155R70J105KA12D
NC
C18, C19
17
RC0402FR-7W10KL
10K
R1, R5, R6, R7, R8, R9, R11, R12 +9
3
0402WGF220JTCE
22
R2, R3, R4
1
0402WGF4702TCE
47k
R10
1
0402WGF6800TCE
680
R15
2
CR0402-FX-9100GLF
910
R16, R17
1
0402WGF2002TCE
20K
R20
3
0402WGF1001TCE
1K
R22, R23, R25
1
ERJ-P06J620V
62
R24
1
0402WGF2003TCE
200K
R28

Modbus master design files

The KiCad project lives in the magnusbpt/Modbus-wireless repository on GitHub; these links point at the commit this page was built from.

Modbus master: common questions

What microcontroller does the Modbus master use?

The Modbus master is built around the ATMEGA2560-16AU, from the AVR/Arduino family.

How big is the Modbus master PCB?

The Modbus master measures 104 × 129 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Modbus master?

77 components, from 41 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Modbus master design files?

From the magnusbpt/Modbus-wireless repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Modbus master design in my own project?

The repository has no license, so all rights stay with magnusbpt. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Modbus master without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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