Junna — Shiina

Test, debug, and simulate Modbus devices without physical hardware. Live data monitoring, fault simulation, and real-time register testing. Master + Slave modes included — no subscriptions, no separate purchases.

Both Modes Included Master + Slave in one app (competitors charge separately)
One-Time Payment Pay $99 once, use forever (no monthly fees)
All Protocols TCP, UDP, RTU, ASCII + 4 hybrid modes

Windows 10/11 · 64-bit · Free 30-day trial · No credit card · Download page →

14Function Codes
8Protocol Variants
4 NEWDiagnostic Tools
$0/monthForever

See It in Action

A modern, intuitive interface for professional Modbus testing and simulation.

Modbus Simulator - Master Mode with data grid and live polling
Modbus Simulator - Address Scanner discovering devices Address Scanner
Modbus Simulator - Live data charts Live Charts
Modbus Simulator - Connection settings Connection Setup

Watch the Demo

Junna — Shiina

As of April 2026, the specific name " Junna Shiina " likely refers to a fusion or misremembering of two prominent figures in the Japanese media landscape: the character Junna Hoshimi Revue Starlight franchise and the professional singer (Junna Sakai). Junna Hoshimi Revue Starlight Junna Hoshimi is a central character in the Shōjo☆Kageki Revue Starlight

When she performs live (she does one secret show per year, announced 24 hours in advance on a dead-simple HTML website), she sits with her back to the audience. She faces the wall. She plays facing the corner.

From there, JUNNA's solo career diversified rapidly. She was chosen to sing the opening theme for the second season of the popular anime Kakegurui×× in 2019. The song became another signature track. Her range continued to expand with the ending theme "イルイミ" (Iruimi) for the anime BEM in 2019, and the powerful opening "海と真珠" (The sea and a pearl) for Fena: Pirate Princess in 2021.

As Junna Shiina continues to evolve and grow as an artist, it's clear that her star will only continue to rise. With her captivating on-screen presence, impressive acting skills, and kind-hearted personality, she has won the hearts of audiences across Japan and beyond. junna shiina

While her work with Walküre earned her initial fame, JUNNA aimed to establish her identity as a solo artist.

: A powerful track from her 3rd full album, marking her 5th anniversary and showcasing her evolution as a songwriter.

Her discography—spanning two EPs and a full-length album, Himitsu no Ame (Secret Rain, 2022)—is not designed for arenas. It is designed for the last train home, for the steam rising from a cup of hojicha at 2 AM, for the moment the headphones seal out the world and leave only the echo of a Fender Jazzmaster through a slightly overdriven amp. As of April 2026, the specific name "

While maintaining a busy schedule as a voice actress, Junna Shiina has made time for public appearances, attending various events, and anime conventions. Her interactions with fans have been met with enthusiasm, as she is known for her warm and engaging personality.

Junna is most active on Instagram, where she shares her daily outfits, beauty tips, and moments with her sister. @junnadayoo Threads: @junnadayoo If you're interested in more, Identify the fashion brands she often wears? Detail her skincare routine products? Share public link

JUNNA's musical evolution is clearly mapped across her discography. She moved from the raw, youthful energy of her early work to more complex and nuanced themes. Her first full-length album, , released in 2018, captured the angst and excitement of adolescence. By the time she released her second album, "20×20" in 2020, she was exploring more mature themes, tackling the transition into adulthood with a newfound depth and vocal maturity. She plays facing the corner

Junna grew up in , in a music-loving household. Encouraged by her mother, she fell in love with singing at a young age. She would often go to karaoke with her mom, and by the fourth grade, she had enrolled in a vocal school to pursue her passion seriously.

Junna's relationships with other characters in the series are a crucial aspect of her development. Her interactions with fellow idols, particularly her closest friends, reveal different facets of her personality.

Performers from the 2009 era primarily relied on blog networks like Ameba to connect with fans. In contrast, Shiina's post-2023 comeback leverages modern visual platforms like Instagram and X (formerly Twitter) to connect directly with a global audience. This direct access helps legacy performers maintain independent monetization and build international fanbases without relying solely on traditional studio promotion. 4. Legacy and Market Influence

, making her the youngest singer in the franchise's 35-year history. Notable Works: "Ikenai Borderline" (Macross Δ) "Here" (Opening for The Ancient Magus' Bride "Umi to Shinju" (Opening for Fena: Pirate Princess "Dear" (Opening for The Ancient Magus' Bride Junpei Shiina Junpei Shiina

Continues to be active, with several of her older works being remastered or repackaged for modern audiences on digital platforms and VCD formats. Notable Works

Why Is It Only $99?

Direct pricing. No marketing overhead. No subscriptions. Just great software.

Typical Competitors

Expensive
Master Tool: $129
Slave Tool: $129
+
Annual Support: $89/year
Year 1 Total: $347
3-Year Cost: $525
  • ✗ Separate Master & Slave licenses required
  • ✗ Limited protocol support
  • ✗ Annual support fees
  • ✗ Fewer function codes

Modbus Simulator

Best Value
Master + Slave: $99
Lifetime Updates: $0
+
Forever Support: $0
Year 1 Total: $99
3-Year Cost: $99
  • ✓ Both modes included FREE
  • ✓ 8 protocol variants (most in industry)
  • ✓ Free updates forever
  • ✓ 14 function codes (industry-leading)
Save $426 over 3 years — and get more features than competitors offer

Everything You Need for Modbus Testing

One tool. Both sides of the protocol. Full visibility. Master + Slave included — competitors charge separately.

8 Protocol Variants

TCP, UDP, RTU, ASCII, RTU-over-TCP, ASCII-over-TCP, RTU-over-UDP, ASCII-over-UDP. RS-485 RTS toggle and local echo support.

14 Function Codes

FC01-06, FC08 Diagnostics, FC11 Event Counter, FC15/16 multi-write, FC17 Report Server ID, FC22 Mask Write, FC23 Read/Write, FC43 Device Info.

Live Data Charts

Real-time line charts with up to 8 simultaneous address traces. Color-coded, auto-scrolling, time-based display.

21+ Display Formats

16-bit signed/unsigned/hex/binary/BCD, 32-bit float (4 byte orders), 64-bit double, 32/64-bit long, and ASCII string.

Data Logging & Export

Log to CSV or XLSX in real-time. Print or export to PDF. REST API for Excel/VBA integration. Full communication logger with TX/RX hex data.

Advanced Diagnostics ✨ ENHANCED

NEW: Raw frame analysis, exception injection, burst/adaptive polling, frame-level diagnostics. PLUS: Test Center, Address Scanner, color rules, scaling/offset, broadcast mode, ENRON/DANIEL addressing.

Two Modes. One Application.

Master Mode

Poll & Control Devices

  • Connect via TCP, UDP, RTU, ASCII, and all cross-framing variants
  • Configure multiple simultaneous polls
  • 14 function codes including diagnostics and device info
  • Write single or multiple coils and registers
  • Address scanner and raw frame test center
  • Broadcast support (Slave ID 0) and ENRON/DANIEL addressing
Slave Mode

Simulate Devices

  • Emulate a Modbus slave for testing masters
  • TCP, UDP, RTU, and ASCII server modes
  • Configurable memory: up to 10,000 registers per type
  • Edit register values in real-time
  • View incoming request log with function codes
  • Configurable slave ID

Flexible Data Display

21+ display formats with 4 byte-order options. Scaling, offset, and conditional color rules.

Unsigned
Signed
Hex
Binary
BCD
Float32
Float64
Long32
Long64
ASCII String

Simple, Honest Pricing

Pay once. Own forever. No subscriptions. No annual fees. No hidden costs. Both Master & Slave modes included.

3+ Licenses
$79
per license · one-time
  • Everything in single license
  • 20% volume discount
  • Separate key per user
  • Team onboarding support
  • Priority email support
What You Get for $99:
Master Mode (worth $129 elsewhere)
Slave Mode (worth $129 elsewhere)
4 Advanced Diagnostic Tools ($50-100 value, not available elsewhere)
All 8 Protocols (TCP, UDP, RTU, ASCII + hybrids)
All 14 Function Codes (competitors have 8-10)
Lifetime Updates ($89/year value)
Email Support Forever (no expiry)

Get Started

Download includes a 30-day free trial. No credit card required.

Download Now

Windows 10/11 · 64-bit · 118 MB

Windows SmartScreen Warning?

After downloading, Windows may show a "Windows protected your PC" warning. This is normal for new software. To install:
1. Click "More info"
2. Click "Run anyway"
The app is 100% safe — no malware, no adware.