# ESP485 **Repository Path**: jiangkaiwen/ESP485 ## Basic Information - **Project Name**: ESP485 - **Description**: 使用8266采集电度表（正泰DDSU666 MODBUS协议）信息 添加进Home Assistant可查看电度等信息 - **Primary Language**: Unknown - **License**: Not specified - **Default Branch**: 1.0 - **Homepage**: None - **GVP Project**: No ## Statistics - **Stars**: 0 - **Forks**: 1 - **Created**: 2025-07-27 - **Last Updated**: 2025-08-14 ## Categories & Tags **Categories**: Uncategorized **Tags**: None ## README # ESP485 ## 简介 讨论群: `810581215` [群友Carl的详细教程](https://songlin.me/2021/11/14/ddsu666-esp485/) 最近`Home Assistant`新增了**`能源`**模块，公司的项目又正好是数据采集相关的，看了下市面上卖的`Modbus`透传模块价格都不低，于是有了自己做的想法。请教硬件朋友，拿到了最简单的`485`转`TTL`电路。等了很久最近`ESPHome`终于初步支持了基于`RISC-V`架构的`ESP32-C3`（极低功耗、`CPU`温度、蓝牙`5.0`、`160 MHz`...非常强）。于是直接二者结合，搞出了指甲盖大小的`485`透传模块。把模块和变压器塞进了`正泰`导轨式模数化插座里（一举两得），测试电表用的是`正泰`的`DDSU666`（理论上支持所有`Modbus`设备数据透传） ![ESP485_1](./img/ESP485_1.jpeg) ![ESP485_2](./img/ESP485_2.jpeg) ![INSTALL_3](./img/INSTALL_3.png) ![INSTALL_4](./img/INSTALL_4.png) ![INSTALL_5](./img/INSTALL_5.png) ![INSTALL_6](./img/INSTALL_6.jpeg) ![INSTALL_7](./img/INSTALL_7.png) ![HASS_2](./img/HASS_2.png) ## `硬件` ### `材料清单` 清单只包含关键材料，不包含焊接工具、线材、刷机工具等辅助工具 # 一定要买MODBUS版本额电表！！！ | 名称 | 型号 | 数量 | PCB标注 | 链接 | | ----- | ----- | ----: | :----: | :----: | | ESP-C3-13U | 4M | 1 | ESP-C3-13U | [购买](https://item.taobao.com/item.htm?id=652413887471) | | AMS1117-3.3 稳压电源芯片降压IC | AMS1117-3.3 | 1 | U1 | [购买](https://item.taobao.com/item.htm?id=522579028878) | | MAX13487EESA SOIC-8 | - | 1 | U2 | [购买](https://item.taobao.com/item.htm?id=549097263944) | | 0603贴片电阻 4.7KΩ | - | 1 | R1/R2 | [购买](https://item.taobao.com/item.htm?id=525820369368) | | 0603贴片电容 50V 100NF ±10% | - | 1 | C1 | [购买](https://item.taobao.com/item.htm?id=537743724825) | | 2.4G内置柔性FPC软天线 | IPEX接头 | 1 | - | [购买](https://item.taobao.com/item.htm?id=574057911861) | | 220V转5V700mA电源模块 | 5V700mA | 1 | - | [购买](https://detail.tmall.com/item.htm?id=543443029399) | | 正泰DDSU666 | 5-80A ModBus | 1 | - | [购买](https://item.taobao.com/item.htm?id=38682717986) | | 正泰模数化插座 | AC30-103 | 1 | - | [购买](https://item.taobao.com/item.htm?id=38332829590) | ### `焊接` 按`PCB`标注焊接即可，注意`ESP-C3-13U`的焊接，缝隙很小，一定要对齐 ## `软件` ### `ESPHome` 这里[参考](https://github.com/martgras/esphome/wiki) ```yaml substitutions: device_name: esp485 esphome: name: ${device_name} esp32: board: esp32-c3-devkitm-1 framework: type: arduino logger: api: encryption: key: !secret api_encryption_key ota: password: !secret ota_password wifi: ssid: !secret wifi_ssid password: !secret wifi_password fast_connect: on web_server: port: 80 button: - platform: restart name: ${device_name}_reboot time: - platform: sntp id: ${device_name}_time uart: id: ${device_name}_uart rx_pin: 18 tx_pin: 19 baud_rate: 9600 data_bits: 8 stop_bits: 1 modbus: id: ${device_name}_modbus send_wait_time: 200ms modbus_controller: - id: ${device_name}_modbus_controller modbus_id: ${device_name}_modbus address: 0x01 command_throttle: 200ms setup_priority: -10 update_interval: 10s text_sensor: - platform: wifi_info ip_address: name: ${device_name}_ip mac_address: name: ${device_name}_mac sensor: - platform: uptime name: ${device_name}_uptime - platform: wifi_signal name: ${device_name}_signal update_interval: 60s - platform: modbus_controller modbus_controller_id: ${device_name}_modbus_controller id: ${device_name}_u name: ${device_name}_u address: 0x2000 register_count: 2 unit_of_measurement: V register_type: holding value_type: FP32 accuracy_decimals: 1 device_class: voltage - platform: modbus_controller modbus_controller_id: ${device_name}_modbus_controller id: ${device_name}_i name: ${device_name}_i address: 0x2002 register_count: 2 unit_of_measurement: A register_type: holding value_type: FP32 accuracy_decimals: 3 device_class: current - platform: modbus_controller modbus_controller_id: ${device_name}_modbus_controller id: ${device_name}_p name: ${device_name}_p address: 0x2004 register_count: 2 unit_of_measurement: W register_type: holding value_type: FP32 accuracy_decimals: 1 filters: - multiply: 1000 device_class: power - platform: modbus_controller modbus_controller_id: ${device_name}_modbus_controller id: ${device_name}_q name: ${device_name}_q address: 0x2006 register_count: 2 unit_of_measurement: var register_type: holding value_type: FP32 accuracy_decimals: 1 filters: - multiply: 1000 device_class: power - platform: modbus_controller modbus_controller_id: ${device_name}_modbus_controller id: ${device_name}_s name: ${device_name}_s address: 0x2008 register_count: 2 unit_of_measurement: VA register_type: holding value_type: FP32 accuracy_decimals: 1 filters: - multiply: 1000 device_class: power - platform: modbus_controller modbus_controller_id: ${device_name}_modbus_controller id: ${device_name}_pf name: ${device_name}_pf address: 0x200A register_count: 2 register_type: holding value_type: FP32 accuracy_decimals: 3 device_class: power_factor - platform: modbus_controller modbus_controller_id: ${device_name}_modbus_controller id: ${device_name}_freq name: ${device_name}_freq address: 0x200E register_count: 2 unit_of_measurement: Hz register_type: holding value_type: FP32 accuracy_decimals: 2 - platform: modbus_controller modbus_controller_id: ${device_name}_modbus_controller id: ${device_name}_ep name: ${device_name}_ep address: 0x4000 register_count: 2 unit_of_measurement: kWh register_type: holding value_type: FP32 accuracy_decimals: 2 device_class: energy state_class: total_increasing filters: - median: window_size: 3 send_every: 3 ``` ### `固件` 请参考 [ESPMMW](https://github.com/liwei19920307/ESPMMW/blob/main/README.md#%E6%95%99%E7%A8%8B) ### `HASS` 打开`HA`管理界面（默认端口`8123`），点击配置，集成，添加集成，搜`ESPHome`，输入`IP`，`#api密码#`就可以接入模块了。能源里添加如下图 ![HASS_1](./img/HASS_1.png) ### `Modbus-RTU` `Modbus`一般分`Modbus-TCP`和`Modbus-RTU`两个种，收发报文有所区别，这里不做过多介绍网上资料很多。我这里介绍`Modbus-RTU`的，`Modbus-TCP`由于没有设备无法测试。一般设备厂商设备说明书里都会提供地址说明（有的可以从官网下到），直接看图 ![Modbus-RTU_1](./img/Modbus-RTU_1.png) ![Modbus-RTU_2](./img/Modbus-RTU_2.png) [DDSU666说明书](https://github.com/liwei19920307/ESP485/tree/main/doc/DDSU666.pdf) ## `DIY` 请参考之前`DIY`的[步骤](https://github.com/liwei19920307/S5in1#%E6%AD%A5%E9%AA%A4) ### `注意` 1、`EPS-C3-13U`进入下载模式只需要通电前将`IO9`接地，接法如下图 ![TTL](./img/TTL.png) 2、外壳和变压器安装注意做好绝缘 ![INSTALL_1](./img/INSTALL_1.png) ![INSTALL_2](./img/INSTALL_2.png)