# Firewatch2.7 Direct 4-20 b038 ## Description Welcome to your new project. Imagine what you can build here. ## Project Details - **Owner:** evildr2002 - **Created:** 1/27/2026 - **Last Updated:** 1/27/2026 - **Visibility:** Public ## Key Components ### — [M3 Mounting Hole](https://www.flux.ai/vasyl/m3-mounting-hole~kc3.md) - Product Info Url: https://www.mcmaster.com/screws/drive-style~torx/rounded-head-style~pan/material~steel/specifications-met~iso-7045/thread-size~m3/finish~zinc-plated/ **Pins:** - terminal ### — [M3 Mounting Hole](https://www.flux.ai/vasyl/m3-mounting-hole~kc3.md) - Product Info Url: https://www.mcmaster.com/screws/drive-style~torx/rounded-head-style~pan/material~steel/specifications-met~iso-7045/thread-size~m3/finish~zinc-plated/ **Pins:** - terminal ### 5v Isolator — [CRE1S0505SC](https://www.flux.ai/vasyl/cre1s0505sc~x7n.md) - Manufacturer Name: Murata Power Solutions Inc. - Manufacturer Part Number: CRE1S0505SC - Part Type: Integrated Circuit - Datasheet URL: https://www.murata.com/products/productdata/8807029407774/kdc-cre1.pdf?1583754812000 **Pins:** - -VIN [pin 1] - -VOUT [pin 3] - +VIN [pin 2] - +VOUT [pin 4] ### AC1 — [Generic Capacitor](https://www.flux.ai/jharwinbarrozo/generic-capacitor~1d.md) - Part Type: Non-Polarized Capacitor - Capacitance: 10uF - Package: SMD_1206_3216Metric **Pins:** - P1 [pin 1] - P2 [pin 2] ### AC2 — [Generic Capacitor](https://www.flux.ai/jharwinbarrozo/generic-capacitor~1d.md) - Package: SMD_1206_3216Metric - Part Type: Non-Polarized Capacitor - Capacitance: 10uF **Pins:** - P1 [pin 1] - P2 [pin 2] ### AC3 — [Generic Capacitor](https://www.flux.ai/jharwinbarrozo/generic-capacitor~1d.md) - Part Type: Non-Polarized Capacitor - Capacitance: 10uF - Package: SMD_1206_3216Metric **Pins:** - P1 [pin 1] - P2 [pin 2] ### AC4 — [Generic Capacitor](https://www.flux.ai/jharwinbarrozo/generic-capacitor~1d.md) - Package: SMD_1206_3216Metric - Capacitance: 10uF - Part Type: Non-Polarized Capacitor **Pins:** - P1 [pin 1] - P2 [pin 2] ### Barrier — [B2B-XH-A(LF)(SN)](https://www.flux.ai/adrian95/b2b-xh-alfsn~5xx.md) - Part Type: Connector - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/eXH.pdf - Manufacturer Part Number: B2B-XH-A(LF)(SN) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: JST Sales America Inc. **Pins:** - P1 [pin 1] - P2 [pin 2] ### Battery — [Phoenix Contact 1757242](https://www.flux.ai/adrian95/phoenix-contact-1757242~wl2.md) - Manufacturer Name: Phoenix Contact - Datasheet URL: https://www.phoenixcontact.com/product/pdf/api/v1/MTc1NzI0Mg?_realm=us&_locale=en-US&blocks=commercial-data%2Ctechnical-data%2Cdrawings%2Capprovals%2Cclassifications%2Cenvironmental-compliance-data%2Call-accessories - Part Type: Connector - Manufacturer Part Number: 1757242 **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] ### Beacon — [B9B-XH-AM(LF)(SN)](https://www.flux.ai/adrian95/b9b-xh-amlfsn~66v.md) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/eXH.pdf - Manufacturer Part Number: B9B-XH-AM(LF)(SN) - Manufacturer Name: JST Sales America Inc. - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] - Pin_9 [pin 9] ### BL-SL — [Pin Header 02x02 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-02x02-254mm-vertical~he5.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] ### BMS Coms — [B4B-XH-A(LF)(SN)](https://www.flux.ai/adrian95/b4b-xh-alfsn~8ne.md) - Manufacturer Part Number: B4B-XH-A(LF)(SN) - Part Type: Connector - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/eXH.pdf - Manufacturer Name: JST Sales America Inc. - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### BMS-COMS — [ADUM1201CRZ](https://www.flux.ai/lcsc/adum1201crz~f9xm.md) - Manufacturer Name: ADI(亚德诺) - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Analog-Devices-ADUM1201CRZ_C660261.pdf - Part Type: Digital Isolators - LCSC Part Number: C660261 - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL - Product Info Url: https://lcsc.com/product-detail/Pre-ordered-Products_Analog-Devices_ADUM1201CRZ_Analog-Devices-ADI-LINEAR-ADUM1201CRZ_C660261.html - Manufacturer Part Number: ADUM1201CRZ **Pins:** - GND1 [pin 4] - GND2 [pin 5] - VDD1 [pin 1] - VDD2 [pin 8] - VIA [pin 7] - VIB [pin 3] - VOA [pin 2] - VOB [pin 6] ### Charger — [Phoenix Contact 1757242](https://www.flux.ai/adrian95/phoenix-contact-1757242~wl2.md) - Manufacturer Name: Phoenix Contact - Datasheet URL: https://www.phoenixcontact.com/product/pdf/api/v1/MTc1NzI0Mg?_realm=us&_locale=en-US&blocks=commercial-data%2Ctechnical-data%2Cdrawings%2Capprovals%2Cclassifications%2Cenvironmental-compliance-data%2Call-accessories - Manufacturer Part Number: 1757242 - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] ### Charger-C — [B2B-XH-A(LF)(SN)](https://www.flux.ai/adrian95/b2b-xh-alfsn~5xx.md) - Manufacturer Part Number: B2B-XH-A(LF)(SN) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: JST Sales America Inc. - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/eXH.pdf - Part Type: Connector **Pins:** - P1 [pin 1] - P2 [pin 2] ### Display — [B4B-XH-A(LF)(SN)](https://www.flux.ai/adrian95/b4b-xh-alfsn~8ne.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: JST Sales America Inc. - Part Type: Connector - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/eXH.pdf - Manufacturer Part Number: B4B-XH-A(LF)(SN) **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### ESP32 Left — [SSW-122-01-F-S](https://www.flux.ai/adrian95/ssw-122-01-f-s~er3.md) - Part Type: Connector - Manufacturer Name: Samtec - Package or Case Code: SAMTEC_SSW-122-01-F-S - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/6129/ssw-1xx-xx-xxx-x-xx-xxx-xx-mkt.pdf - Manufacturer Part Number: PPPC221LFBN-RC - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 01 [pin 01] - 02 [pin 02] - 03 [pin 03] - 04 [pin 04] - 05 [pin 05] - 06 [pin 06] - 07 [pin 07] - 08 [pin 08] - 09 [pin 09] - 10 [pin 10] - 11 [pin 11] - 12 [pin 12] - 13 [pin 13] - 14 [pin 14] - 15 [pin 15] - 16 [pin 16] - 17 [pin 17] - 18 [pin 18] - 19 [pin 19] - 20 [pin 20] - 21 [pin 21] - 22 [pin 22] ### Esp32 Right — [SSW-122-01-F-S](https://www.flux.ai/adrian95/ssw-122-01-f-s~er3.md) - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/6129/ssw-1xx-xx-xxx-x-xx-xxx-xx-mkt.pdf - Package or Case Code: SAMTEC_SSW-122-01-F-S - Manufacturer Name: Samtec - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: SSW-122-01-F-S **Pins:** - 01 [pin 01] - 02 [pin 02] - 03 [pin 03] - 04 [pin 04] - 05 [pin 05] - 06 [pin 06] - 07 [pin 07] - 08 [pin 08] - 09 [pin 09] - 10 [pin 10] - 11 [pin 11] - 12 [pin 12] - 13 [pin 13] - 14 [pin 14] - 15 [pin 15] - 16 [pin 16] - 17 [pin 17] - 18 [pin 18] - 19 [pin 19] - 20 [pin 20] - 21 [pin 21] - 22 [pin 22] ### GPS — [B4B-XH-A(LF)(SN)](https://www.flux.ai/adrian95/b4b-xh-alfsn~8ne.md) - Manufacturer Part Number: B4B-XH-A(LF)(SN) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/eXH.pdf - Part Type: Connector - Manufacturer Name: JST Sales America Inc. - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### K1 — [G2RL-24 DC24](https://www.flux.ai/lcsc/g2rl-24-dc24~ivbm.md) - Manufacturer Part Number: G2RL-24 DC24 - LCSC Part Number: C397256 - JLCPCB Part Class: Extended Part - Manufacturer Name: OMRON(欧姆龙) - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2211282230_Omron-Electronics-G2RL-24-DC24_C397256.pdf - Package or Case Code: RELAY-TH_G2RL-2 - Product Info Url: https://lcsc.com/product-detail/New-Arrivals_Omron-Electronics-G2RL-24-DC24_C397256.html - Part Type: Power Relays **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] ### K3 — [G5Q-1A4-DC24V](https://www.flux.ai/lcsc/g5q-1a4-dc24v~tval.md) - LCSC Part Number: C2931104 - Manufacturer Part Number: G5Q-1A4-DC24V - Package or Case Code: RELAY-TH_G5Q-1A4 - Manufacturer Name: OMRON(欧姆龙) **Pins:** - COIL1 [pin 5] - COIL2 [pin 1] - MAIN [pin 2] - NO [pin 3] ### LoRA — [B4B-XH-A(LF)(SN)](https://www.flux.ai/adrian95/b4b-xh-alfsn~8ne.md) - Manufacturer Part Number: B4B-XH-A(LF)(SN) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: JST Sales America Inc. - Part Type: Connector - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/eXH.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] ### MTL — [B8B-XH-A(LF)(SN)](https://www.flux.ai/adrian95/b8b-xh-alfsn~8f6.md) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/eXH.pdf - Manufacturer Part Number: B8B-XH-A(LF)(SN) - Manufacturer Name: JST Sales America Inc. - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] ### Polarity 1 — [Pin Header 02x04 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-02x04-254mm-vertical~453.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### Polarity 2 — [Pin Header 02x04 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-02x04-254mm-vertical~453.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### Polarity 3 — [Pin Header 02x04 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-02x04-254mm-vertical~453.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### PowerSW-2 — [B7B-XH-A(LF)(SN)](https://www.flux.ai/adrian95/b7b-xh-alfsn~1i8.md) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/eXH.pdf - Part Type: Connector - Manufacturer Name: JST Sales America Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: B7B-XH-A(LF)(SN) **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] ### PS1 -24V — [THN 15-2412WI](https://www.flux.ai/adrian95/thn-15-2412wi~vs1.md) - Package or Case Code: THN154811WI - Manufacturer Name: Traco Power - Manufacturer Part Number: THN 15-2412WI - Part Type: Power Source - Datasheet URL: https://www.tracopower.com/products/thn15wi.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - -VIN_(GND) [pin 2] - -VOUT [pin 5] - +VIN_(VCC) [pin 1] - +VOUT [pin 3] - REMOTE_ON/OFF [pin 6] - TRIM [pin 4] ### PS2 -5V — [D24V50F5](https://www.flux.ai/jecstronic/d24v50f5~mu.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: D30V30F5 - Manufacturer Name: Pololu - Datasheet URL: https://www.pololu.com/product/2851 - Part Type: Module **Pins:** - EN [pin 1] - GND [pin 4] - GND [pin 3] - VIN [pin 2] - VOUT [pin 5] ### PW-L — [Pin Socket 01x08 2.54mm Vertical](https://www.flux.ai/adrian95/pin-socket-01x08-254mm-vertical~cz1.md) - Part Type: Connector - Manufacturer Part Number: PPPC081LFBN-RC - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### PW-R — [Pin Socket 01x08 2.54mm Vertical](https://www.flux.ai/adrian95/pin-socket-01x08-254mm-vertical~cz1.md) - Part Type: Connector - Manufacturer Part Number: S7041-ND - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### RA1 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Resistance: 120Ω - Package: SMD_1206_3216Metric - Part Type: Resistor **Pins:** - P1 [pin 1] - P2 [pin 2] ### RA2 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Resistance: 120Ω - Part Type: Resistor - Package: SMD_1206_3216Metric **Pins:** - P1 [pin 1] - P2 [pin 2] ### RA3 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Resistance: 120Ω - Part Type: Resistor - Package: SMD_1206_3216Metric **Pins:** - P1 [pin 1] - P2 [pin 2] ### RA4 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Resistance: 120Ω - Part Type: Resistor - Package: SMD_1206_3216Metric **Pins:** - P1 [pin 1] - P2 [pin 2] ### RAS1 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Resistance: 1kΩ - Part Type: Resistor - Package: SMD_1206_3216Metric **Pins:** - P1 [pin 1] - P2 [pin 2] ### RAS2 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Resistance: 1kΩ - Package: SMD_1206_3216Metric - Part Type: Resistor **Pins:** - P1 [pin 1] - P2 [pin 2] ### RAS3 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Package: SMD_1206_3216Metric - Part Type: Resistor - Resistance: 1kΩ **Pins:** - P1 [pin 1] - P2 [pin 2] ### RAS4 — [Generic Resistor](https://www.flux.ai/jharwinbarrozo/generic-resistor~3e.md) - Package: SMD_1206_3216Metric - Part Type: Resistor - Resistance: 1kΩ **Pins:** - P1 [pin 1] - P2 [pin 2] ### Reset — [TX2-3V](https://www.flux.ai/lcsc/tx2-3v~vn51.md) - Package or Case Code: RELAY-TH_TX2-3V - LCSC Part Number: C425156 - Product Info Url: https://lcsc.com/product-detail/Relays_PANASONIC-TX2-3V_C425156.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1912111437_PANASONIC-TX2-3V_C425156.pdf - Part Type: Power Relays - Manufacturer Name: PANASONIC(松下) - JLCPCB Part Class: Extended Part - Manufacturer Part Number: TX2-3V **Pins:** - 1 [pin 1] - 10 [pin 10] - 12 [pin 12] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 8 [pin 8] - 9 [pin 9] ### RS485- — [Pin Header 01x05 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-01x05-254mm-vertical~cas.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] ### SD CARD — [4682](https://www.flux.ai/jecstronic/4682~7ep.md) - Manufacturer Name: Adafruit Industries LLC - Datasheet URL: https://cdn-learn.adafruit.com/downloads/pdf/adafruit-microsd-spi-sdio.pdf - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Module - Manufacturer Part Number: 4682 **Pins:** - 3V [pin 1] - CLK [pin 3] - CMD/SI [pin 5] - D1 [pin 7] - D3/CS [pin 6] - DAT2 [pin 8] - DET [pin 9] - DO/SO [pin 4] - GND [pin 2] ### Timer — [Pin Socket 01x04 2.54mm Vertical](https://www.flux.ai/adrian95/pin-socket-01x04-254mm-vertical~kks.md) - Manufacturer Part Number: S7037-ND - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] ### TTL — [Pin Socket 01x04 2.54mm Vertical](https://www.flux.ai/adrian95/pin-socket-01x04-254mm-vertical~kks.md) - Manufacturer Part Number: S7037-ND - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/evildr2002/firewatch2p7-direct-4-20-b038~md](https://www.flux.ai/evildr2002/firewatch2p7-direct-4-20-b038~md).* --- *Generated from [https://www.flux.ai/evildr2002/firewatch2p7-direct-4-20-b038~md](https://www.flux.ai/evildr2002/firewatch2p7-direct-4-20-b038~md)*