1. Companies developing interoperable products are encouraged to follow the LonMark Interoperability Guidelines. Application-specific Functional Profiles can be downloaded from the Guides & Specifications section to help you through the development process.
   • If you have questions about the Guidelines and certification process, please send an email to cert@lonmark.org.
   • If you have questions about specific Functional Profiles, please login to the Member Area and direct your questions to the appropriate Task Group Leader.

2. You must be a LonMark International Partner or Sponsor Member in good standing in order to access the Web-based LonMark Certification Tool (LCT).  If you are not yet a LonMark member, membership information and an application form can be found in the Membership section of this website.

3. You must have access to the Member Area of the LonMark website.  If you are a LonMark member in good standing and do not have a valid ID and password, you may request Member Access here.
   

4. In order to access the LCT and create a Certification Project, testing fees must be pre-paid.
   The Testing Fees are as follows:
   
   

Product	Fees
Annual Tool License	US$ 2000
New Certification	US$  200
Upgrades (devices replacing older devices)	US$  100
Administrative Changes	US$  100

We currently accept the following forms of payment:

1. Purchase Orders
2. Bank Checks
3. Wire Transfers
4. Credit Cards

Payment information may be submitted by the following methods.
Internet payment is not yet available:

1. Telephone: +1 408-938-5266, x 1
2. Fax: +1 408-790-3838
3. Email: admin@lonmark.org

LonMark Certification Tool License Agreement

5. Click here to go to the LonMark Certification Tool Login page in the Member Area.