HMS101-S Wireless Module

1. Overview

The HMS101-S is a compact, low-power, long-range bidirectional wireless transceiver module designed based on HOPERF's CMT2300A high-performance wireless transceiver chip.

The HMS101-S wireless module adopts advanced wireless communication technology, providing outstanding anti-interference capability and stability, ensuring accurate and reliable data transmission. Its low-power characteristics enable the module to maintain good performance during long-term use, saving energy costs.

The module has a wide range of applications, whether in smart homes, industrial automation, or the Internet of Things (IoT) field. Its highly integrated design simplifies installation and deployment, saving significant time and effort.

2. Main Technical Parameters

3. Pin Location Diagram

A diagram shows the top view pinout of the HMS101-S module. The pins are numbered 1 to 20. Key pins include GND, NC, PB0, PB1, U2RX, U2TX, NRST, SWCLK, SWDIO, VDD, RXD, TXD, GPIO1, GPIO2, PB3, and 485 EN.

Figure 3-1: Top View Pinout Diagram

4. Pin Descriptions

Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation.

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. —Consult the dealer or an experienced radio/TV technician for help.

RF Exposure Statement: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body.

FCC Label Instructions: If using a permanently affixed label, the modular transmitter must be labeled with its own FCC identification number, and, if the FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: "Contains FCC ID: 2ARNB-HMS101V1S1”. Any similar wording that expresses the same meaning may be used. The Grantee may either provide such a label, an example of which must be included in the application for equipment authorization, or, must provide adequate instructions along with the module which explain this requirement.

OEM Guidance

1. Applicable FCC rules: This device complies with part 15.247 of the FCC Rules.
2. The specific operational use conditions: This module can be used in IoT devices. The input voltage to the module is nominally 3.3V DC. The operational ambient temperature of the module is -40 °C ~ 85 °C. The external antenna is allowed, such as an External omnidirectional antenna.
3. Limited module procedures: N/A
4. Trace antenna design: N/A
5. RF exposure considerations: The equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body. If the equipment built into a host as a portable usage, the additional RF exposure evaluation may be required as specified by 2.1093.
6. Antenna:
   • Part Number: A6040390; Antenna type: External omnidirectional antenna; Peak antenna gain: -2.78 dBi
   • Part Number: A6040414; Antenna type: External omnidirectional antenna; Peak antenna gain: 0.82 dBi
   • Part Number: A6040294; Antenna type: External omnidirectional antenna; Peak antenna gain: -0.35 dBi
   • Part Number: A6040411; Antenna type: External omnidirectional antenna; Peak antenna gain: -0.05dBi
   • Part Number: A6040286; Antenna type: External omnidirectional antenna; Peak antenna gain: -0.35 dBi
   • Part Number: A6040311 Antenna type: External omnidirectional antenna; Peak antenna gain: 0.84 dBi
7. Label and compliance information: An exterior label on OEM's end product can use wording such as the following: "Contains Transmitter Module FCC ID: 2ARNB-HMS101V1S1” or “Contains FCC ID: 2ARNB-HMS101V1S1".
8. Information on test modes and additional testing requirements: The modular transmitter has been fully tested by the module grantee on the required number of channels, modulation types, and modes; it should not be necessary for the host installer to re-test all the available transmitter modes or settings. It is recommended that the host product manufacturer, installing the modular transmitter, perform some investigative measurements to confirm that the resulting composite system does not exceed the spurious emissions limits or band edge limits (e.g., where a different antenna may be causing additional emissions). The testing should check for emissions that may occur due to the intermixing of emissions with other transmitters, digital circuitry, or due to physical properties of the host product (enclosure). This investigation is especially important when integrating multiple modular transmitters where the certification is based on testing each of them in a stand-alone configuration. It is important to note that host product manufacturers should not assume that because the modular transmitter is certified that they do not have any responsibility for final product compliance. If the investigation indicates a compliance concern the host product manufacturer is obligated to mitigate the issue. Host products using a modular transmitter are subject to all the applicable individual technical rules as well as to the general conditions of operation in Sections 15.5, 15.15, and 15.29 to not cause interference. The operator of the host product will be obligated to stop operating the device until the interference has been corrected.
9. Additional testing, Part 15 Sub part B disclaimer: The host integrator installing this module into their product must ensure that the final composite product complies with the FCC requirements by a technical assessment or evaluation to the FCC rules, including the transmitter operation and should refer to guidance in KDB 996369. For host products with certified modular transmitter, the frequency range of investigation of the composite system is specified by rule in Sections 15.33(a)(1) through (a)(3), or the range applicable to the digital device, as shown in Section 15.33(b)(1), whichever is the higher frequency range of investigation. When testing the host product, all the transmitters must be operating. The transmitters can be enabled by using publicly-available drivers and turned on, so the transmitters are active. In certain conditions it might be appropriate to use a technology-specific call box (test set) where accessory devices or drivers are not available. When testing for emissions from the unintentional radiator, the transmitter shall be placed in the receive mode or idle mode, if possible. If receive mode only is not possible then, the radio shall be passive (preferred) and/or active scanning. In these cases, this would need to enable activity on the communication BUS (i.e., PCIe, SDIO, USB) to ensure the unintentional radiator circuitry is enabled. Testing laboratories may need to add attenuation or filters depending on the signal strength of any active beacons (if applicable) from the enabled radio(s). See ANSI C63.4, ANSI C63.10 for further general testing details. The product under test is set into a link/association with a partnering device, as per the normal intended use of the product. To ease testing, the product under test is set to transmit at a high duty cycle, such as by sending a file or streaming some media content.